Hillary Clinton returned to the campaign trail Thursday, four days after her near fainting spell, with little room for another misstep.

The moment she took the stage, Clinton addressed the topic that has overwhelmed headlines since Sunday: Her health. She acknowledged to the Greensboro, North Carolina, crowd that being forced to stay at home following her pneumonia diagnosis at such a crucial moment in the election wasn’t easy to stomach.

“As you may know, I recently had a cough that turned out to be pneumonia. I tried to power through it but even I had to admit that maybe a few days of rest would do me good,” Clinton said, after walking out into a school gymnasium to James Brown’s “I Got You (I Feel Good).” “I’m not great at taking it easy even under ordinary circumstances, but with just two months to go until Election Day, sitting at home was pretty much the last place I wanted to be.”

CNN/ORC Polls: Trump’s national gains extend to Florida, Ohio

After grudgingly following her doctor’s orders to slow down and rest to recuperate from pneumonia – and watching Donald Trump seize the spotlight and pull even or ahead in some key swing states such as Ohio – the Democratic presidential nominee has signaled she is eager to make a feisty comeback at a crucial moment in the election.

One of the last times the public saw Clinton, she was being helped into a van by her security detail, her knees buckling and body slouching over as she lost her balance.

Clinton said she spent the time at home reflecting, as she mused that “the campaign trail doesn’t really encourage reflection.”

“It turns out, having a few days to myself was actually a gift,” she said.

With less than two months until Election Day, polls have begun to tighten. In Clinton’s absence, Trump and his surrogates were free to relentlessly attack the former secretary of state with relatively little pushback. Trump particularly zeroed in on Clinton’s in artful comments from last Friday night, in which she described half of Trump’s supporters as being in a “basket of deplorables.”

Hillary Clinton accepts the Democratic Party's nomination for president at the Democratic National Convention in Philadelphia on July 28, 2016. The former first lady, U.S. senator and secretary of state was the first woman to lead the presidential ticket of a major political party.

Before marrying Bill Clinton, she was Hillary Rodham. Here she attends Wellesley College in Massachusetts. Her commencement speech at Wellesley's graduation ceremony in 1969 attracted national attention. After graduating, she attended Yale Law School.

Rodham was a lawyer on the House Judiciary Committee, whose work led to impeachment charges against President Richard Nixon in 1974.

In 1975, Rodham married Bill Clinton, whom she met at Yale Law School. He became the governor of Arkansas in 1978. In 1980, the couple had a daughter, Chelsea.

Arkansas' first lady, now using the name Hillary Rodham Clinton, wears her inaugural ball gown in 1985.

The Clintons celebrate Bill's inauguration in Little Rock, Arkansas, in 1991. He was governor from 1983 to 1992, when he was elected President.

Bill Clinton comforts his wife on the set of "60 Minutes" after a stage light broke loose from the ceiling and knocked her down in January 1992.

In June 1992, Clinton uses a sewing machine designed to eliminate back and wrist strain. She had just given a speech at a convention of the International Ladies' Garment Workers Union.

During the 1992 presidential campaign, Clinton jokes with her husband's running mate, Al Gore, and Gore's wife, Tipper, aboard a campaign bus.

Clinton accompanies her husband as he takes the oath of office in January 1993.

The Clintons share a laugh on Capitol Hill in 1993.

Clinton unveils the renovated Blue Room of the White House in 1995.

Clinton waves to the media in January 1996 as she arrives for an appearance before a grand jury in Washington. The first lady was subpoenaed to testify as a witness in the investigation of the Whitewater land deal in Arkansas. The Clintons' business investment was investigated, but ultimately they were cleared of any wrongdoing.

The Clintons hug as Bill is sworn in for a second term as President.

The first lady holds up a Grammy Award, which she won for her audiobook "It Takes a Village" in 1997.

The Clintons dance on a beach in the U.S. Virgin Islands in January 1998. Later that month, Bill Clinton was accused of having a sexual relationship with former White House intern Monica Lewinsky.

Clinton looks on as her husband discusses the Monica Lewinsky scandal in the Roosevelt Room of the White House on January 26, 1998. Clinton declared, "I did not have sexual relations with that woman." In August of that year, Clinton testified before a grand jury and admitted to having "inappropriate intimate contact" with Lewinsky, but he said it did not constitute sexual relations because they had not had intercourse. He was impeached in December on charges of perjury and obstruction of justice.

The first family walks with their dog, Buddy, as they leave the White House for a vacation in August 1998.

President Clinton makes a statement at the White House in December 1998, thanking members of Congress who voted against his impeachment. The Senate trial ended with an acquittal in February 1999.

Clinton announces in February 2000 that she will seek the U.S. Senate seat in New York. She was elected later that year.

Clinton makes her first appearance on the Senate Environment and Natural Resources Committee.

Sen. Clinton comforts Maren Sarkarat, a woman who lost her husband in the September 11 terrorist attacks, during a ground-zero memorial in October 2001.

Clinton holds up her book "Living History" before a signing in Auburn Hills, Michigan, in 2003.

Clinton and another presidential hopeful, U.S. Sen. Barack Obama, applaud at the start of a Democratic debate in 2007.

Obama and Clinton talk on the plane on their way to a rally in Unity, New Hampshire, in June 2008. She had recently ended her presidential campaign and endorsed Obama.

Obama is flanked by Clinton and Vice President-elect Joe Biden at a news conference in Chicago in December 2008. He had designated Clinton to be his secretary of state.

Clinton, as secretary of state, greets Russian Prime Minister Vladimir Putin during a meeting just outside Moscow in March 2010.

The Clintons pose on the day of Chelsea's wedding to Marc Mezvinsky in July 2010.

In this photo provided by the White House, Obama, Clinton, Biden and other members of the national security team receive an update on the mission against Osama bin Laden in May 2011.

Clinton checks her Blackberry inside a military plane after leaving Malta in October 2011. In 2015, The New York Times reported that Clinton exclusively used a personal email account during her time as secretary of state. The account, fed through its own server, raises security and preservation concerns. Clinton later said she used a private domain out of "convenience," but admits in retrospect "it would have been better" to use multiple emails.

Clinton arrives for a group photo before a forum with the Gulf Cooperation Council in March 2012. The forum was held in Riyadh, Saudi Arabia.

Obama and Clinton bow during the transfer-of-remains ceremony marking the return of four Americans, including U.S. Ambassador Christopher Stevens, who were killed in Benghazi, Libya, in September 2012.

Clinton ducks after a woman threw a shoe at her while she was delivering remarks at a recycling trade conference in Las Vegas in 2014.

Clinton, now running for President again, performs with Jimmy Fallon during a "Tonight Show" skit in September 2015.