I would go with a possible gall bladder issue.
Several WDW trips ago, DW and I dined our first night at Ohana's at the Poly, we sampled everything twice!!!!
a few hours later, she got sick, and then it got worse!!
called a doctor to the room and got some meds, he diagnoised a possible gall bladder attack, and confirmed that it can happen just that fast.
Got back home and she went for a Dr. Visit, and sure enough, that was the problem. No fried foods or GREASY foods. The grease and fat in the beef was suspected to be the cause of her major discomfort!
Chicken, fish, and lean pork dishes, not so bad!
(had to have the operation!)