Health

While you can be allergic to anything at any time, I don't think the vaccines did it to you, those would have provoked a reaction in hours.

You're going to need to list any medications you take on a daily basis as well as foods you ate before the itiching started and have eaten since then. You'll probably need a low dose steroid to clear the bumps and some guidance about testing any daily medication to see if it's the culprit. You'll want to let the prescribing doctor know what's going on, also, but ER/UC will get you seen faster.

Good luck tracking this down. Vaccines are a remote possibility, but definitely mention those, also.