Anyone have a new dairy intolerance?

Ten months in and I have some progress and some lingering issues, and some entirely new ones. Yesterday I made macaroni and cheese for dinner, but within half an hour I was really nauseous, burping, gurgling you could hear in my stomach. Lasted about two hours. This morning diarrhea. Googled the symptoms and it came up lactose intolerant, which I wasn't before. Now it seems I am.