I am being treated for chlamydia and I took two pink pills of Azithromycin. I took them around 4:15 - 4:30 pm today and I felt fine until I ate pizza around 6:00 pm. I had two slices and I felt so nauseated that I got into the shower. I threw up at 6:30/6:45 but did not see any pills or signs of the pills. Should I go back to the doctor and get more or is it already in my system?