Once correctly diagnosed, there are some physiotherapists specialising in hands/wrists who might be able to help. (Some physiotherapists are very good with diagnosis too.)
I don't get loss of feeling in fingers, but I do get pain in the little finger and the ring finger. Mine comes from excessive mouse-usage. If you suspect this might be a cause, then try using the mouse with the other hand so that you can rest the problematic hand.
Typing onto the notebook is generally ergonomically pretty bad for you. Try getting an external keyboard.