I just had one of the worst sexual moments of my life. First time with new girlfriend and I just could not perform, luckily she is super cool and understanding. I don't know if it was nerves, or I was just thinking too much (dunno how to turn that off) but I could not get it up. I can get very hard while masturbating or watching porn, and even got almost entirely hard while we were messing around ,so I know it's not a physical issue, but just as we were about to start it disappeared. I'm wondering if lately I've been watching too much porn and masturbating that it's effected my thought process during sex, or if I'm just thinking too much before we go at it. Any ideas and suggestions on how I can resolve this issue? I'm hoping it was just a one time thing but I'm so bummed right now I could see it lingering.