Hello and welcome,
Can you list any diagnosis/s that have been clearly ruled out?
Have you have imaging? x ray, MRI, CT scans? spine, brain etc?
full blood work ups?
If you have reports for any of those it may help members, or they will ask if it may help them.

Any family history of similar?
Any injuries in the past?

The hyper sensitivity to touch, makes me wonder about RSD/CRPS.
Often you will get swelling, temperature & color changes of the skin too.
It can also make muscles spasm and contract..
Our forum for more info , you can read & see if it might fit-
http://neurotalk.psychcentral.com/forum21.html