I had unprotected sex about 2 days ago....ever since then my penis has just felt weird I've been feeling a burning sensation every once in a while it doesn't hurt when I pee, I am expierencing more fatigue than usual and it has been itching down there quite a lot since, I don't have a fever or anything like that but it's just bugging me I don't know what to do is it herpes? I just don't know I haven't really ever had this happen to me after sex before does anyone know what it could possibly be?