[Chunky]

I wish I had some good advice for you. When I have had issue it was with my bow arm..or my shooting shoulder.

If it is hurting you that much, you need to change something.

You might try to do more pulling with your back muscles and less with your arm. You may be putting your right arm in a bad position...is your elbow back or out to the side?

Maybe changing your anchor point....I don't know.

If you want, I can watch you shoot at the shoot later this month and see if I can see anything...not that I am an expert or anything, but willing to try.