Moi, Sounds like you have a few dif. issues goin on all at once! Have you ever tried the TENS unit? I Love mine, as it sometimes can "change" the impulses to the brain to tik...Therefor it may give you a break. Not sure if there are any medical issues why you could NOT have one.
You also mentioned (glucosamin/msm) .....earlier you mentioned the itching & burning...Although it took several Months to build up (about 8) I was found to be allergic to it. It has Ground up oyser shells or other marine life which I was sensitive to. But it took a long time to find out that this was the cause. Then one day the "lite" went on.lol

That's why I had asked about allergies to seafood? As I also mentioned most of my tiks are mild. The TENS unit helps me a LOT. I know it will not fix anything but a good break now & then helps! Good luck my dear & keep a positive outlook. You Will find a way!