Basically I'm a 20 year old male, don't smoke or drink a lot and exercise daily. Well the time came to have sex with someone I find very attractive who also has had sex several times before, and I couldn't reach an erection. I know this is probably due to performance anxiety but since we don't have the ability to see each other often due to her working and me being in university I don't have to ability to get more comfortable daily. I'm scared next time we decide to have sex I won't be able to perform again. I know I need to relax but is it possible to use viagra for my first time just to get the anxiety out of the way.
My main concern right now is that after this encounter I'm having trouble getting an erection where as before I could masturbate up to three times daily.
I have had this problem before and it was anxiety. Getting more comfortable with her helps get over it. Obviously, the best thing to do is to spend more time with her to feel more comfortable. Maybe you could arrange spending time with her with no expectations of sex, and if it happens it happens. And let her know that. If she likes you will be ok with it.
And, I have tried viagra to help me through the early stages of a relationship where there was anxiety, and it worked like a charm.