Erection dilemma during sex
I am an 18 year old male and lately I have been having some trouble with staying hard during sex. Me and my girlfriend just recently started having sex and I lost my virginity to her. I guess I take a long time to peak because she always mentions when she is down on me, are you almost there, my jaw hurts? After like 5 minutes and it turns me off. I think that during sex I focus on trying to reach orgasm too much and trying to please her because going in to the encounter I don't really get a full hard on and am focused on losing it, and when I start I lose my erection after like 3 minutes. I don't know what it could be. Maybe me dwelling on the fact that I could lose my erection doesn't help but I don't know what it could be. I don't have problems masturbating and do it frequently while I'm away at college. Does anybody have any suggestions or ideas of what it could be?