Do you see a specialist for your psoriasis? I'd start there-- by asking if there is any connection with your food intake and triggering worsening of your symptoms.
None of what you describe is really typical for IgE-mediated food allergy, fortunately-- and unfortunately.
Fortunately because panic attacks can sure
feel scary and awful-- and they often come with what seems like cardiac symptoms liek a racing heart, etc-- but they aren't going to result in death the way anaphylaxis can.
Unfortunately because figuring it all out is likely to really be difficult, much more so than if it
were explained by a food allergy. I'm sorry, but look at it this way-- knowing what IS the problem is ultimately the key to feeling better.
It's always possible that it is an allergy/intolerance to something commonly found in those foods you've been avoiding and which was NOT part of this admittedly odd series of SPT.
I'd have gone 'round the bend at the lack of professionalism you describe, with a healthcare professional giggling and texting in the room with me. Yikes. Kudos to you for not doing her bodily harm, I say.