Problematic Intercourse and psychological chaos

My name is Duane, and I am 20 years old. My girlfriend and I had sex about 3 weeks ago. The unfortunate thing is that I could not orgasm during sex after having sex for about 2 hours. When she rode me, I felt like my muscles could not support her. In the 2nd hour, I finally stopped when I pulled a leg muscle. About a week prior, she gave me a handjob and I could not orgasm either. When we had sex, I was a little nervous because she told me that she had herpes. Even with a condom on, I was still afraid and a little worried. As for the handjob, we did it in a parking lot with cars passing so I was nervous as well. Despite this, my impotence during sex made me very worried about my orientation. Every now and then, I get "Am I gay" panic attacks. For my whole life, I have been straight and watch a large amount of straight porn (which I have read could have been another reason for my impotence). I also do have a history of panic attacks throughout my life, primarily in academics. Even though I think I may suffer from E.D. and/or delayed ejaculation, I still have these concerns despite my certainty about me being straight. What is my problem?

[AnnieBrooke]

Sounds like anxiety more than anything else.  Are you seeing a therapist?  You might be able to relax about everything if you did.  The stuff you wrote is possible to live with without even worrying, for some people.  They have a gay thought, it just passes by with "so what."  They have a time when they can't orgasm, and it's again, so what.  

Panic attacks are no fun, and are treatable with good therapy and probably some kind of anti-anxiety meds.  I'd hit them soon, so they don't become ingrained.  You don't want to still be having panic attacks when you are 40.  Being not so anxious will probably make your sex life more happy.

[duane90]

The panic attacks continue though. I do not know what to do. Is this really an orientation issue or is my tendency towards panic attacks the reason why this continues?