GAS PAINS- DO NOT READ IF EASILY GROSSED OUT :)
This could be it! When my gall bladder went bad, the pain was so bad that the doc suspected kidney stones for several months.
Unfortunately since my surgery, I have this problem regularly when I eat something that does not agree with me...like more than a few peanuts. I carry air freshener in my purse...really! Did you eat anything new recently?
If I were you, I would still get the old gall bladder checked out. I went through about eight months of pain that was completely unnecessary.
Hugs,
Becky