I'm having some major issues with getting it up with my girlfriend. We've been able to have sex before multiple times but everyonce in a while I just can't get hard. Recently we've tried 3 times and nothing. I even tried doing it by myself in the shower and it didn't really work. So I'm starting to freak out. Everything points to performance anxiety but nothing really helps in getting rid of it. What should I have thinking in my head when were going to have sex. How do I fully relax? Is there anything to take?