Lesbians and Bi girls, is this normal?

Ok, here's the situation, I have previously identified myself as bisexual. I like guys emotionally and fantasize about them. Except that I saw an actual penis for the first time earlier today and found it completely disgusting. I wanted to throw up. Don't get me wrong I think that the male form is beautiful. Except for that. I could not even imagine letting that thing inside of me. Is this normal to you? Will I get over it or am I just a full on Lesbian? I know people ask this kind of thing ALL the time but I mean.. come on! Help a girl out? At least for the 10 points?