After today, im really scared over a problem im having..First off im 18, my girlfriend is the love of my life and I think she is the most beautiful and sexiest girl ever. Just being around her makes me horny. I dont have any erection problems until it comes to sex. We were both virgins until..I beleive sept 23rd so about a month ago, so we had sex that day and the next day..And we just did it again today...I dont ever have erection problems doing anything else..But all 3 times we had sex, it was a pain for me to get erect and if it fell out, I had to pull that condom off, she'd get it hard again and put anothe rone on and continue..Well today it was a total health forum and we ended up cutting it short..But this problem is really scaring me..And I have no idea what to do..I know ive been a bit nervous each time and ive always been a bit weirded out by condoms. Any help?