Randomly started reacting super bad to mosquito bites.

Junie

So in the last month as I've stated I started reacting really bad to mosquito bites. They start normal but the slowly get bigger the more they itch. The next day or two it will be huge, red, painfull (when scratched) and sometimes swollen depending on where the bite is. The bite itself ends up about the size of a quarter or bigger and then a bigger red circle around it, just a little less the size of a tennis ball. Within the next day or two the outer circle is gone but the bite is still there the same size. I don't know what to do.. I never feel them biting me and no one around me is ever getting bit.. its freaking me out and making me feel ugly..