Allergic to Beer?

Patient: I love beer, and drink beer regularly. Not in any crazy amount, just perhaps a few beers a week when I got out with my grad school buddies. Recently, after having a few beers, about 3-4, I get sick. I throw up, have diarrhea, and the shakes. I still feel crumby today. This happened for the first time last week when I had 4 beers, and Thursday I had 3 beers, and it did not happen, but then it happened last night. Do you think it could be certain beers like heavy in wheat? I have been favoring the Cold Snap by Sam Adams which is similar to a Blue Moon Wheat Beer. This is scaring me, because I do not want to develop a gluten intolerance. I eat bread and other wheat products and nothing happens. Thanks! Nicole

Symptoms: diarrhea, nausea, vomiting, sometimes a headache

Doctor: