@Santino I'm so sorry to hear you have so few safe foods! I know there are several people on this forum who have or have had that few foods. Gratefully it is not an issue of mine.
My question is what medications do you take to help your MCAS? Have you tried any? Food coloring, air pollution (chemical and petroleum), and dust and pollens seem to be my worst offenders, but I have noticed recently that ketotifen is helping block the reaction from the petrol fumes.
Also, if you aren't on any mast cell stabilizers or H1 and H2 blockers, are you able to get prescriptions compounded with no fillers or coloring? It might make it more tolerable to treat viruses and bacteria if you are properly medicated.
I definitely am not your best resource here as I have such mild MCAS, but it is helping me tolerate medications for my co infections now that I am on 4 different antihistamine and mast cell stabilizers. But my treatment is fairly new, so I can't answer yet if antibiotics work yet. 6 months of antivirals did nothing, 2 months of antibiotics doesn't seem to be doing anything either, but too recent to know. My personal gut feeling is that it has been more important for me to properly medicate my MCAS than viruses and bacteria infection. But I may change my mind with time.
Tagging
@justy and
@Gingergrrl as they have MCAS closer to your symptoms. I know there are others here, but my brain fails me as to their names!