Reddit mentions of Comp Guide To Food Allergy & Intolerance

>molds are everywhere on fresh foods.

No they aren't.
It sounds like you haven't figured out what are your safe foods, so you're attributing symptoms to molds. But you might have food sensitivities or allergies that you don't know about.

Celiac disease can cause a lot of generalized sickness and digestive distress, so getting tested for that might be a good idea. And maybe getting checked by a gastroenterologist - you might have other problems causing digestive distress.

After you get tested for celiac disease, you might be able to sort out your actual food sensitivities by doing a hypoallergenic elimination diet, where you don't eat common food allergens or anything that you habitually eat, for at least a week. Followed by food challenges with the foods you eliminated, meaning that you try a single food (one plant species or one animal species) at a time, and wait at least a couple days to see what happens and wait for any reaction to clear up before trying the next food. The link has elimination diets of varying strictness. You might want to do the food challenges in a doctor's office, since you've had anaphylactic reactions.