Does coffee give you an upset stomach???

I usually always drink decaf coffee, but this morning i drank regular coffee since i was out of my decaf. A couple of hours or so after i drank it i had an upset stomach and i felt kind of sick to my tummy. It still feels kind of yuk but i was wondering if anyone else experienced this when drinkin coffee?? I know too much coffee can cause you to produce stomach acid but i didn't even finish one cup this morning....Anyone else expereince this??