BBertha, I feel your pain , literally, I also play golf through the pain. It’s mainly in my thumb joint on both hands but the left is worse, My GP gives me steroid injections three times a year which helps a lot,
Before I go out to play golf I take two ibuprofen and paracetamol, apply Voltarol cream on the joint then I wear a soft wrist support(Amazon ).
It helps , I also love sewing and knitting so the injections help me carry on with my hobbies, When the injections wear off after 3/4 months it’s very painful again till the next time,
Have you asked your GP about steroid /Cortisone injections ?
I am sure it would help you , if I didn’t have them I would have to give up golf and I really don’t want to have to give in.
Good luck , I hope you get some relief. 👍