It seems to be known that POTS and mast cell activation syndrome may go together, and of course POTS is pretty well associated with ME. This isn't true IgE mediated allergy, to me it seems much much much worse than that.
Yes but psoriasis and arthritis go together and arthritis and autoantibodies go together but psoriasis and autoantibodies don't go together. The paper on mast cells and POTS makes no mention of fatigue. And a lot of people talk of ME being more associated with orthostatic intolerance of other sorts than POTS. I still don't see evidence for a link between allergy and ME.