I'd say just be happy it is tennis elbow and not golf balls.
I have no magic cures for you. I would get professional help, a real doc, and not count on internet advice. If you have a partly torn tendon or the like and someone's home remedy leads to it being clear torn off rather than recovery, you're pretty well [bleep]. Probably they'll send you in for an MRI since it is soft tissue, look for tears, then if it is generally ok, send you to a physical therapist with specific instructions regarding how to help it recover. That'll be some therapist-assisted exercises. It'll be a pain in the ass, inconveniently timed, expensive, and .. you probably better do it anyway. Might get better on its own, but it might not. The might not part doesn't go anywhere good.
Tom
