It happens every few months, sporadic enough that I can't identify any particular trigger or food that causes it. I will suddenly get stomach cramps and an urgent need for the loo, on the loo I will be dripping in sweat, my hearing goes weird and I faint (or nearly faint if I manage to drop my head low enough in time). Afterwards I'm fine, just drained. My appetite isn't affected and it's not related to my menstral cycle. It's happened since I was a teenager and I've always just ignored it, but it seems to be happening more frequently now
I've had a colonoscopy which was normal, all blood tests normal, stool culture was negative for everything.
Has anyone had this or has any ideas what it could be?