Sounds pretty drastic to me. If that doesn't do the trick, or makes you worse, what then? Having the hemoclips, and scarring removed certainly won't be an option anymore.
Any doctor can inject you will lidocaine, or some other anisthetic, and make any part of your body go numb/block the pain/etc. I'm not thinking this experiment he performed on you proves anything far as what you should do next, but that's just my opinion.
Having a bilateral epididymectomy certainly isn't my idea of going slow. If it fails to help, you will have few options left.
I never advise what surgical procedures men should have. I can help you weigh out pros, and cons, give you my thoughts, etc, etc, but I draw a line when it comes to "what should I do" when it comes to the knife. My reasoning, I don't have to live with the outcome of the procedure.