chlamydia infection
"I found out that I had Chlamydia yesterday. 
Very upsetting. Went to see my doctor and she prescribed me 450mg azithromycin tablets.( p.s. ensure that you have something to eat before you take these tablets) 
While I was on my way home, my stomach started feeling really tight and I felt like I wanted to throw up, but I didn't. So make sure you eat first.
But so far, I don't have any major side effects or anything like that. Just occasional stomach cramping but nothing too severe. And I do feel nauseous once in a while as well."