Embarrassing first time sex? Please read all?

Ok. So I am 15, male, and I had sex with a girl yesterday for the first time. This girl is absolutely perfect to me, like everything about her is exactly what I look for in a girl. And I had never even made out with a girl before we did it. I don't mean to be graphic, but she got naked, and I didn't get an erection, and we made out and I didn't get an erection, and I tried to put it in, but I couldn't because my penis was too limp, so she gave me a ******** until I got an erection and I put it in and we had sex for about 15 minutes, and I didn't orgasm, so we laid their and talked and cuddled and repeated what we did before. And we did that process multiple times and she ended up having to leave and I never got my orgasm. Is there anything wrong with me? Oh, and I masturbated a few hours before she came over, would that have anything to do do with it? Because that's what I thought but I still haven't really gotten aroused since then, and I get aroused very easily and at random times. So please help me, I don't know if it was because I masturbated before hand, or if I'm gay, or if there's something wrong with me. Please give your opinions, advice or answers.