Do you have the special mouthwash (Magic Mouthwash or whatever it goes by in your area)? Lidocaine plus various ingredients, depending on the formulation in each place. That can help with the mouth. Even if you're not eating by mouth, it does numb for a bit. (Again, you may already have this, but worth mentioning in case you don't.)

(ETA: if you're just rinsing and not swallowing with it, you can use it fairly frequently... don't be afraid to use what you need!)

And I am REALLY glad you are already on the Fentanyl and other stuff ... I wish it would do more for you, but it does help!

((hugs))

It will get better. It will get better. It will get better. (Keep telling yourself this. It's true.)