I just checked google and saw multiple ads for ALLERGISTS offering blood tests for histamine intolerance. I'm such a "cowgirl". So many medical tests havefailed with me because of my combination of problems, I would try the Covid histamine cure, which I have seen descrbed by group members. Perhaps joning Facebook Neuro V Long-Haulers, C. vaccine injured sufferers, you can share your vibtation symptoms and talk with someone who has found relief. Join the Fb group anyway. Sounds as if you are vaccine injured. Happy huntng and blessings.