I know this might sound weird, but I'd like to know what's causing it. For most of my life that I can remember and more so now. I'll get this terrible cramping in my lower intestines that feels like a contraction. When I sit down to go the bathroom, it takes forever and these cramps continue. If I don't fan myself, I'll feel like I'm going to black out (sometimes). Then once the b.m. passes, I feel fine. Does anyone experience this or know what causes it?

I think it may have to do with eating onions or certain seasonings...