i hear ya.
alergies are funny.
i used to be highly alergic to ant and wasp stings.
ant stings would literally cause paralysis in my legs!! and wasp stings make painfull red whelps and swelling.
fast forward years later. mino ant bits don't even make marks. bad ones make a lil pimple in a day. wasp stings hurt right when hit.. 5m later.. nada.
i had to clear some brush last week, thought of this thread... i moved quite a few vines of p-ivy. wondered how my luck would hold.
knock on wood.. still holding so far.. though I DO try to NOT get exposed. no need to tempt fate..e tc...