Hi im a young man, and i got diarrhea recentlt, it lasted a week, i went to the doctor and he gave me polyantibiotics,which worked. My stool is all better now. But still has a yellow slight brown color. Recently i have been feeling a bit weird in my neck and bicept area. A small but managable pain, and i still have a lot of gas. I had unprotrected sex with 3 hiv negative people for thr past month. Please help