Sounds like you've got nerve ending damage...
hi!, i do experience what you feel...but i was diagnosed of cervical spondylosis and structural condition in my cervical spine...that's why...
Do you experienced it on your right or left hand&arms...?
Position yourself on side lying, opposite to your numbness...for good circulation of blood...it will help. And avoid things that can make stress on your hand & arms. I'm not a doctor, but with my experience and my doctors' advice, it helps. . .and keep on praying...
Take care and God bless.
My wife has this from time to time. She uses an arm/wrist wrap to help keep her wrist and hand straight during the night. Seems to relieve the pain.
You say you have carpal tunnel, are you seeing the dr for it, are you planning on surgery to fix this?