I have been receiving jaw treatment for a year now and can strongly recommend it. I was diagnosed 23years ago with MS, like you I suffered neck, shoulder and back pain - I gradually lost mobility in my legs but blamed all my symptoms on MS.
I was found to have asymmetries in my teeth, jaw, Atlas and Pelvis. The problem starts at the top with teeth and jaw so I started wearing dental braces to bring them into better alignment. Other asymmetries in the spine are compensating for the jaw misalignment so I actually had one leg longer than the other as a result of my pelvis tilting. This in its turn caused leg pain and patchy numbness.
Only four months of treatment with the brace was enough to allow spontaneous realignment of my Atlas and Hips. The numb patches I had all over my legs went away along with the complete disappearance of a horrible MS symptom called L'Hermitte's sign. I haven't been troubled with it since.
I would echo EJC and Dania's advice - to get a symmetry evaluation, it sounds to me like you are a perfect candidate for TMJ related problems. Try to convince your Mum to get looked at too, I really have not had so much relief from my MS symptoms with anything else. I feel the best I have for years