Hi, Thank You. I Have Had Two Bowel Movements This

Hi, thank you. I have had two bowel movements this morning but as soon as I ate lunch I had to find a bathroom quickly with, what I assume, was explosive diarrhea. Sorry, I know this is gross. I had milk last night with my meal and have been trying to stay away to see if that is the problem. Then had a wheat bun on my hamburger for lunch. I am "thinking" that I am either lactose intolerant or wheat. I still do not feel right, nasty taste in mouth and warm head...no fever. There were no cramps or pain with this "activity". Any ideas? Thank you.