Re: possibly a pinched nerve?
I'm not a doctor, but it sounds like Sciatica - have they mentioned that at all?
Really though, trying to guess and figure out what's wrong with yourself can make you crazy/paranoid. Try and be patient and see what the doctors come up with; in the mean time look after yourself well.
"If you can find a path with no obstacles, it probably doesn't lead anywhere.” - Frank A Clark