“Then I started getting a little bit of body aches, then you get headaches, next thing you know I’m draining my nose, next thing you know I’m breathing really, really heavy at night,” Rivers told The Denver Post ahead of Friday night’s game against the Hawks, his first with the team since Nov. 29. “Especially at night, I was really struggling a little bit to where I started getting really nervous and scared,” he said. “And then mentally, it plays on your head. Now that you know you have this and you’re breathing hard, you’re overdoing it. I’m thinking crazy, ‘Is it going to get better, or like, what’s going on here?’”