I am sorry to read that you are in such pain.
I know well the arms and hands pain and numbness.
I also had cervical surgery and was left with increasing
pain that eventually spread to both arms.
I was diagnosed this year with Myofascial Pain Syndrome
which in the neck can cause all the nerve problems as the
muscle spasms the fascia tightens and then pulls on the
fascia on the nerves, thus causing the incredible pain and
heavy tingling and numbness in the hands and arms.
With the right treatment this can be much improved.
A Doctor of Osteopathy is what you want to look for and
also a therapist that specializes in MFP and fascia release.
With the release treatments for the muscles and stretches
for the fascia I have improved 90% over where I was for
2 1/2 years.
Please look into this as it may be the answer for you, it
certainly was for me.