Sharp pulling pain in/behind belly on?

I have a sharp pulling pain in my belly on. I get it once in a while, a few times a year. I am not ovulating or menstruating, not pregnant, no piercing/tattooing there. I am lying on my side with my foot elevated due to a broken toe, but no strenuous activity is going on. I haven't eaten anything in hours. No appendix, no gallbladder (both removed 4+ years ago). I have had the pain both before and after removal of gallbladder. Any ideas?