Hi and welcome to the site,
sorry to hear your having these problems,
around two years ago i was having the sore heads the stiffness in my neck swelling of fingers and a horrible burning in both my hands.
The docs put it down to damaged nerves, they put me on tramadol and gabapentin to try sort this out, like yourself i had 6 months in bed not able to interact in anything besides sleep. the burning pain in my hands was so bad i would hit them off the side of the bed, unable to brush my own hair it was so depressing for me.
eventually i stopped the medication, and found out later the gabapentin caused alot of my pain instead of curing it. And recently after a sub annie hemorage found out i was allergic to the tramadol.
i hope this gives you a bit of help and maybe your doc could change the meds your on. i wish you the best of luck to get to the bottom of this ill health.

please excuse my gramma i'm still in recovery from sub annie hem. 6mths ago.

love and light
roberta