<<Disclaimer: Verify this information before applying it to your situation.>> You are probably lactose intolerant. From what I have read, celiacs generally are. I'm wheat, rice and lactose intolerant. The lactose in the cheese probably caused your reactions. I just had 4 cheese and mushroom corn tortillas, and even though i took lactaid caplets before i ate, i now have pressure in my head over my eyes. it's getting hard to keep them open. So that could be one cause. Dara