Can't Eat Without Becoming Sick

My wife is going through another period of stomach issues. For the last three days she has become ill after almost every meal. Timing couldn't have been worse the last few days and it has been very frustrating when these spells have hit. This morning we had a staff party that my wife had to leave because she became ill from the snacks provided. She missed the majority of the party stuck at the house sick. The same thing happened yesterday while we were at a banquet. Everything was OK until she ate, then within minutes she started having stomach cramps. We needed to leave immediately after the banquet and it took a good hour for her to feel better.

We are still not sure what causes this reaction to food. It doesn't matter what she eats or when she eats it, she gets sick without rhyme or reason. Tonight she was going to wait to eat until after a Christmas program our daughter was in, but made a plate and ate anyways. She expected to be sick within minutes, but was fine for the rest of the evening. It would seem like there would be some logic to all of this, but we have not been able to piece any of it together yet. We have tried different foods, eating at different times, resting and other things but have not had any luck yet with any of our attempts at controlling this issue. I would love to hear if anyone else has had any luck figuring out what triggers this problem. Hopefully this spell of the issue is over and my wife will be back to normal, but until then we have to be aware that our schedule may be changed based on her stomach.