Hello Everyone

I have been having this unknown pain for about two months or so now. I do have IBS/spastic colon. But this pain is different from all the rest.
The pain that I have been experiencing has been on my left side and under my rib and I can't even lay on my left side or I will hurt so bad and I can't hardly move or turn over. During the day I am ok. The only problem during the day is that I can't twist my body to the left or it hurts soo bad.
and my right side under my rib has been hurting as well, but the pain is different. It feels like someone stabbing me off and on. I have had blood work and a cat scan done so far. Everything so far has come up normal. Can someone please help me with some kind of an answer maybe to at least check into that it could possibly be, because my doctor is boggled.
Please Help!
Thank You