Continue to seek help until you find a reason for what is causing your symptoms. Eventually you will, trust me. If you have to go to several doctors, do so until you find one that listens and can figure this out. I was my own "doctor" in that I didn't give up and researched and figured out what was wrong with me.
One thing that was suggested to me but that my insurance wouldn't cover was Botox injections. I think it would probably help relieve the pain and stiffness/tightness in my neck and shoulders. I don't understand why it's not covered.
Another thing that was suggested that I haven't actually looked into was acupuncture. My neurologist says many of her patients have gotten great relief from it. Massage is great too, I just can't afford it. Of course these are suggested by my doctor and you should discuss this with yours to see if it would be beneficial for you. You also need to find the cause of your symptoms. I hope you can find an answer soon. I know how frustrating it is.