If you had an anaphylactic reaction-- and it certainly sounds as though you did-- then forget anything that the second doctor told you.
Well, except this part--
Everything looked fine except my immune system was still all riled up, months later, and I still had extremely high levels of inflammation in my body
IgG allergy testing is pure hocus pocus. Sorry, but that won't help you to avoid anaphylaxis. It doesn't sound to me as though it was entirely "idiopathic" but more likely what is known as "exercise-induced."
Ibuprofen is not exactly unknown as a provoking agent, there-- particularly among people who are asthmatic of have asthma in their families. Do you?
There are known interactions between strenuous activity and allergen exposure acting
synergistically to produce systemic reactions which are VERY much more severe than they otherwise would be. It is possible that wheat + activity = allergic reaction, that chickpeas did it only when combined with your run-- or that ibuprofen + activity does. Generally, the interval between the consumption of the food and the triggering of the severe reaction needs to be less than 3 or 4 hours, though. I hope that provides you with some ideas. You mention wheat and chickpeas-- what exactly DID you eat within 3-4 hours of the reaction, and why were you taking ibuprofen, if you don't mind saying?
Do you have an epinephrine autoinjector?? If you don't, please go back to doctor #1 and ask for one. Become familiar with the signs of severe allergic reactions so that you know when you should use epinephrine.
I'm really glad that you found us, Kelly!