So I just lost my virginity but didn't cum....

I am really nervous, I mean we went at it for an hour before she had to go because her mom was ready for her to come home (we are teens) and I didn't even feel like I was about to. Is something wrong with me? We had problems getting it in and me just staying hard because we couldn't get it in. She said she loved it and I could tell because when we started going she was moaning and almost screaming my name. We are in a very good relationship and I loved her before we ever did it and she loved me. So r/sex, what is wrong with me? Why didn't I cum?