I'm no expert but to me it sounds a lot like the symptoms you are experiencing are psychological. I've never heard of any std that can deplete the sex drive. Is it possible that it was the nature of this encounter that has affected you psychologically in some way?
I'd have to agree. The only thing you have left to check out physically is prostatitis. Have you had a prostate exam?
You wouldn't get symptoms of any std that fast, and you wouldn't get an std from rubbing her panties like that.
Aj