Treatment for Persistant Nerve Pain

I have been struggling with a persistent pain on the right side of my belly. More recently, it feels like it originates in my back and wraps around to the front. My doctor ordered a bunch of blood tests and a CAT scan of my abdomen. Everything appears to be normal. My doctor is quite sure that this is a pinched nerve. Can you get this much pain from a pinched nerve? And the medications my doctor prescribed to treat the pain are so expensive. Any suggestions?