I posted a link on this forum awhile back that said if you go to an endodontist, expect a root canal. Period. That is their training, that's what they know, that is what they are very likely to give you.

I think you should trust your instincts, do your research, get opinions from dentists, oral surgeons, etc. and move forward with some plan of action.

I hope and pray you are able to secure the opinion and services of a highly trained, intelligent and caring expert and get good/safe relief.
I just said a prayer for your wellbeing.