So I'm 21 never had sex but turned down a few in my life skin 18 (bc I would Precum and be embarrassed) and i would always Precum even when I would just hold hands or just by talking to her, so finally about 2 weeks ago I took a girl on a date went back to her apartment and things started to go in that direction so I said what not I'm not gonna let it pass but had no  condom but she agreed to giving me head  and I had been Precuming for the last hour and a half (not constantly) so it was on my boxers witch she didn't mind so she went on for about 10 min and I could not cum at all. Is that bc I had pre cum a lot right before??  Keep in my that this was my first time getting any time of sexual thing happen to me.. Please help