HI, I have been experiencing multiple symptoms for about a year that I cannot explain. They include what seem like allergic reactions to foods that I have always eaten and can eat again after. Trembling, nausea, heart palpitations, dizziness. At times I also get hives on my face and a tight throat. I also have rashes all over my body. Doctors keep telling me I am having panic attacks. I believe this is partially true but can stress and panic bring on hives and rashes? Antihistamines also seem to help with the rashes and daily reactions. Ive been allergy tested for everything and I am not allergic to any of the things I am reacting to. Thanks