I just got off my period two days ago, yesterday my boyfriend and I had sex. A couple minutes after, I went to the bathroom, and when I came back out I felt light-headed and nauseous, then my vision went completely white and I actually passed out. After coming to my hearing was as if water was in my ears, after that wore off, I alternated between feeling nauseous and light-headed, but after about an hour it subsided altogether. The next time I went to the bathroom there was a very clear discharge with some blood in it and today I have a milky white discharge mixed with brown. What is going on, this has never happened before?