Johnson East and her husband, former Washington Football Team long snapper Andrew East, are expecting their second child later this year.
"Got my results back [Sunday] and they came back positive for COVID," the former Olympic gymnast wrote on her Instagram story Sunday night. "Not going to lie ... I'm nervous knowing I'm positive. It's been a long two weeks of RSV [respiratory syncytial virus] with Drew and now this ... my body is exhausted."
Johnson, who has dealt with asthma for most of her life, said she is experiencing a cough, sore throat, fatigue and a headache. She also noted that she had a close family member "fight for his life" last month while battling the coronavirus.
"Just a reminder to take care of yourself," she wrote. "Drink an extra water tonight and wash your hands."
Johnson East, a native of West Des Moines, Iowa, won a gold medal on the balance beam at the 2008 Olympic Games in Beijing. She also won silver in the team, all-around and floor exercise that year.
The 29-year-old Johnson East then won ABC's Dancing with the Stars in 2009 and finished second during the All-Star season in 2012.
She retired from competitive gymnastics in June 2012.