I have know answers but, pray for your pain relief. I beleive you should switch the meds and increase them till you reach releif or seek a nerve ectomy.
It sure is nagging and painful to have this sort of pain.But I believe you should reduce your solid type intake and have more of liquid diets or soft diets.Besides switching to better medicines,since the ones you have been using may not be working as it was earlier.May god bless you and give you relief soon.
Wow I really feel for you. You are taling 80 mg. meth and fentynal for breakthrough? That's a lot but there may be better combinations like Dilaudid and oxycodone or oxymorphan. all the best