Sunlion07,
I still have tongue tiredness and pain 10 years out from my original diagnosis, 5 years out from my last treatment, and 2 years out from my jaw replacement.
I’m glad that all your tests came back clear as a recurrence should be the first concern with pain. I did go to speech therapy a few years and were helpful, but have been neglectful in the exercises. I did sleep with a humidistat for several years, and that was helpful too with dry mouth and awakening, rinsing, as did sleeping on an incline.
If speech and language therapy is available in your are, especially through your ENT’s office, that may be helpful too.
Any dental exams lately? My dental surgeon in my head and neck cancer dept diagnosed my osteoradionecrosis thus the pain in the jaw then.
Good luck