Yup, been there. Tennis first, then Golfers ( golfers is the inside, in the exact opposite place to tennis ) then tennis returned again - 30-Love
I'm thinking mine was nowhere near as bad as yours, but i had the anti-inflams and tramodol and solpadol, and he also told me to rest my arm somewhere, like along the arm of my sofa ( and sat down, as well ) so my arm was kinda parallel to floor but only the hand itself was in the air, hanging over the arm of the sofa.
Then, get a can of baked beans ( other food is available ) and hold the can, palm down, and do wrist raises. He did explain what this did, but whether it helped i dont know because in all 3 cases of T and G elbow i had, they cleared up after around 6 months