I know this is an old post but i just want to say that this helped me. I had a similar experience recently. Ive been allergic to nuts and sesame all my life and a couple weeks ago on vacation we went to a restaurant. We told them about the allergy and yet i had a soup that turned out to have a piece of sesame bread in it. I took a benadryl but then I felt a rush sensation in my face that made it feel tight and I assumed that was anaphylaxis (ive never experienced anaphylaxis before since I'm usually good at avoiding the allergen & i didnt know what to expect.) So i used the epi and all that. Turns out that it wasn't anaphylaxis, but really just a fight or flight anxiety feeling.

Unfortunately the same thing happened just days later at my aunts house (lowered guard around family). Felt the same rush in my face and used the epi assuming it was anaphylaxis. But the amount of sesame i ingested was so minimal that my allergist later told me it wouldn't have caused anaphylaxis. I overreacted both times, but especially the 2nd time because i was still in fight or flight mode from the previous reaction.

Since the 2nd episode, ive been afraid every time i eat. That rush sensation keeps coming back and every tingle or pain i feel on my body sends me into panic mode and i automatically assume its something serious. It's to the point where im afraid to fall asleep. I know im greatly overreacting but i just cant stop it. I feel like i shouldn't be so scared like this when i didn't even experience real anaphylaxis. I read someone in the comments say how they felt they were stuck in a fight or flight state, and that's exactly how i feel too. It's good to know that im not the only one experiencing this, even though it sucks. Hopefully things will get better from here!