Dear Betsy:
It is always difficult to give a diagnosis over the internet. Yes, this could be a "pinched" nerve problem. One needs to know if the "nerve" problem is a brachial plexus problem or other problem. A good neurological exam, with the historical important points noted will go a long way in elucidating the problem. If you have objective loss of muscle strength then you might have a brachial plexus problem, or if the paraesthesias (sensation) problems are localized to a specific nerve distribution then you might have an ulner or median nerve problem. I suggest you seeing a neurologist.
Sincerely,
CCF Neuro MD