Some of your symptoms show classic histadelia symptoms (high histamine). High histamine can occur with copper toxicity. Search for "laredo7" on these forums and check out her newest posts on this.
If this is the case, then it makes complete sense that folic acid and B12 worsen your symptoms. High histamine foods could also do this. Your histidine levels are also above range, which MAY point to high histamine because its the precursor to it.
Anyway, google it and you'll find a lot of info.
I am pretty sure I am low histamine. I don't sweat and cannot produce tears in my eyes. I NEVER have headaches. I have paranoid type symptoms/social anxiety. Some symptoms seem to overlap between the two conditions.