I can totally relate to you right now. I am currently numb from my waist down, including my genital region (which appear to be the most numb). I am female, but it is also driving me crazy when it comes to sex.
I have hope that the feeling will return shortly, but in the meantime, I am trying to enjoy sex in other ways. Do you have any other erogenous zones that do not include your penis? Perhaps you can stimulate these areas to help bring you to an orgasm.
I follow the Swank Diet, and have been increasing my intake of vitamin B and D. I hate steroids, so do not want to take any.