First, let me start by saying I am a 22 yr old female. I have been tested for many, many illnesses in the last six months, with all being negative, so I do not just have allergy problems, but my question today is, after I eat wheat, msg, soy, high fructose corn syrup/high sugar foods, milk products, and several other food items, I either get an instant headache which lasts for a while, or I get a sick, throw up type stomach feeling. I do have IBS, but these symptoms are different. The allergy tests I had done were negative, so I am wondering if what i may have is food sensitivities. Does anyone have any suggestions. Just because the tests are negative, could they be wrong??? Thanks!!