Hi, I had unprotected sex about a month ago and I have been very worried about STD's. The guy said that he was clean and that he previous partner and only partner for the last 6 months was tested but I don't know what to believe. I also went to the Student Health Services at my University for a check-up and they said evrything looks good but to make sure I kept an eye on things. Well, I have been having slight light brown discharge for about 2 days now and I usually get this right before my period but I am not supposed to start my period for another week. Just wondering if this could have anything to do with STD's and if so which ones and what should I do?