Well, it could be two (or more) allergies. I would continue to cut out those gourd family things, and see if you can get a list of the ingredients for those bars. If they aren't on the wrapper or box (which they should be), then you can call and ask. Then you can start the whole search again, for another culprit. Sucky, but at least you will have a list to start from this time!
Any chance of calling the allergist back? Seems rude to leave a message unreturned for so long...