I have been attemping nofap for a couple of years now, but never really took it that seriously until around one month ago. Brought a girl back to mine for the first time after being on a two-week streak, so considered that perhaps abstaining was working after all. Didn't have sex as I stupidly didn't have a condom on me. Then.... continuing my streak I met another girl through a friend who have been seeing for the last month. All the times I have met her have been leading up to Friday night... when she stayed at mine. Everything was going well, and then I couldn't maintain an erection. So messed up my chance to lose my virginity and now don't think she is going to see me again (I'm 21 btw). I was pretty nervous as I was taking her back to mine (overthinking what to do, what if i mess up etc) to the point where the girl even noticed that I was nervous by asking 'are you ok?' on two occasions. I just have never been in that position truly so am not really sure of what I'm doing and then feeling embarrassed because they will notice. She was advising me where to finger her on two/three occasions, which is quite embarrassing. I was pretty tired when I met her having just finished a 11 hour shift at work so was already fairly stressed. I finished work at around 9 and met her at 10. By the point she was back at mine it was like 2:30am. Maybe this was not a wise time to try such a thing? All the times over the years when you least need an erection and the one time I needed it... nothing. I am so annoyed about what's happened and don't know what to do or think. I started PMO'ing from 15 up until, maybe once/twice a week- so not as serious as other people on here. I haven't watched porn in 3/4 months and have masturbated once in the last month. I predominantly masturbated to just photos of women, as opposed to porn- which was something I didn't watch all that often. I was hoping that giving this up would help, and I know it can take time, but I'm rarely even getting random erections now and penis looks smaller than usual. What I have been getting instead are wet dreams because I have been thinking about this girl a lot, I had two of them last week. Not sure if the cold weather will have anything to do with this at all, but I'm not sure what to do if this happens to me again. Should I be concerned, or is this normal?