What is my weird little pain?

I'm 60, a woman, and have had a pain come and go since my 20's. It's somewhere in the pelvic area, colon or intestine--very hard to pinpoint. It most often happens when I'm sitting or standing. When sitting I have to raise myself up to ease it. Only lasts 2 or 3 seconds and I get it about 6-8 times a year. No problems with BMs.