Hey I'm sorry I don't know too much about most of what you're going through, but I think you should stop taking the zantac that's gonna screw you over.. Doctors like to tell people they're making too much stomach acid when they aren't.. most people are not making enough! and then they hand out these drugs which cover up your symptoms and make you feel better, but they lower your acid in the stomach even more and destroy your gut health :(
You should probably stop relying on drugs altogether :\ they aren't very good for you.. they often make you worse if you overuse them and they don't really get to the root of the problem.. they just cover it up
It's good that you are trying to avoid exposure to your allergies, that would probably help a lot since allergies weaken the immune system a lot! you should probably work on your gut health and try to build up your immune system though! You might have leaky gut and candida so you should stick to your diet, but maybe do more. I don't know though I'm only new to this myself >< but yeah like nyckid said if you have got heavy metals you're not gonna get very far because they will be constantly suppressing your immune system so if nothing helps maybe you should see if you have them