People react differently to mmj, for most it works great for some it causes adverse side effects like you had. Talk with the people at the dispensary you go to, they may be able to recommend something less potent, there have been major advancements in mmj and there are many varieties and options available. It's not all about the THC and getting high anymore, and you can find strains that are low in thc but have more tac for example.
I agree with
@1964dodge about the salve, it works wonders.
Physical therapy was a lifesaver for me, I hope you find it beneficial as well.
Hope you can find a way to work through the pain and feel better
Hugs
@full