What could be causing this pain?

I have pain on my left hand side just below my ribcage more towards my back than my front. It started off as a dull ache and i would get this really intense stabbing pain that came in waves. The pain is getting worse and now is an achy kinda burning pain and every so often i will get this intense shooting pain. I also feel nauseous and keep getting dizzyspells. It gets worse when i move. I don't have a kidney infection. Any ideas what could be causing this