As you have tested negative for the sea foods on allergy testing,so it might be that you are allergic to any of the ingredients or preservatives in which it was cooked.Same ingredient or preservative may have been used in the mushrooms or hamburger.
However anything can be said with confirmation only after allergy testing. Skin tests are used for this purpose. This test involves pricking, scratching or injecting food extracts into the patient’s skin. The skin will react with redness and swelling for those extracts capable of eliciting an allergic reaction when consumed.Other tests used are blood tests like RAST and food challenge tests.I feel that you should consult an allergist and get allergy testing done to the various preservatives and mushrooms.
Hope it helps.Take care and pls do keep me posted on how you are doing or if you have any additional queries.Kind regards.
It certainly can be a food additive. Has this only occurred in restaurants?
I'm just trying to think outside the box here, but could it be possible that you're experiencing anxiety attacks? I've had a few and they're scarier than hell, often, with the same symptoms as you describe. If you hyperventilate, I could understand your face getting tingly.
Just a thought....
Best of luck!