Coffee suddenly giving me a not-so-pleasant time on the toilet

I've been regularly drinking coffee for a couple years now with no problems, except maybe getting gassy if i drink too much. Recently i started getting diarrhea even from the littlest amount of coffee, and i have no idea why. It's not one type/brand either, i tried instant, pods, beans, and from different shops... I always get explosive diarrhea.

Has anybody else had something similar happen to them?