I know how awful it is as I've suffered with anxiety and panic disorder all my life. It
sounds as if you're experiencing the same thing. My symptoms
were all the same. Felt like I was going to pass out, or die, blurry vision, tightness in chest, lightheadness, sick to my stomache, headache, labored breathing, unable to sleep, unable to eat and just scared all the time.
The food allergies are a drag to be sure but totallty manageable.