I developed pretty bad tennis elbow in my right arm due to repeated microtrauma from my job which is very physical…lots of heavy lifting and quickly. I actually went to physical therapy for almost 3 months before I finally got a cortisone shot in my elbow, which helped for a few months but nothing heals like time and strenghtening exercises, but the trouble is you can’t do the strengthening exercises until the symptoms are gone. You can do all the stretches though.
If you google stretches, and exercises, for tennis elbow you’ll find a ton of info. One thing that relieved my pain the most was contrast baths. Get 2 tubs/pails/dish buckets -whatever your arm can comfortably stretch out in and be fully submerged under water. Fill one with very hot tap water and the other with cold + a few ice cubes. You put your arm in one for a couple minutes then the other. Back and forth for about 10-15 mintues. It helps increase the blood flow to the area and help inflammation. I found great relief with it. (temps should be the greatest extreme that you can handle)
Unfortunately it has never gone away but has gotten much better. OH-my physical therapist used to say maybe I was taking a long time to heal because of diabetes, maybe it’s true, maybe not- everyone says that it seems.
Good luck and hope you start healing soon. I know it’s hard not being able to do the simplest things without pain.