A doctor will more than likely prescribe an SSRI or something similar, which in turn will kill your libido and drive to chase women. Not that that is necessarily a bad thing, but you say you want to get laid.
Being in Vegas you have never once thought of just hiring an escort and letting her handle everything just to ease your anxiety a little so when you are actually with a girl you like your anxiety will be lessened.
I'm not sure all the details to your situation and you may very well need professional help, I'm just very leary of psych drugs or anything those docs tend to prescribe.
As stated previously, I would get your hormones checked and get with an endo first and fore most and see how you feel after some possible treatment, if that's something you would be a good candidate for.
Edit: Judging by your pic you just look like an average dude, not sure why you are feeling so insecure about yourself.