I have no idea what happened however I felt an irritation and slowly my top lip (only my top lip) started swelling up. A few hours later I started getting abdominal pain and then diarrhea which lasted a very short time. What can it be? I cannot thing of anything that I am allergic too. I was cleaning my sons room the day before which was a garbage dump. Shouldn't I have gotten a reaction last night and not this afternoon?