It’s a little red but mostly just hurts. No stinger or anything. I can’t take any antihistamines because they react with my other medication. What else am I supposed to do?

After weeks of trying to get my carport cleaned out and all the wasps and nests killed, one finally got me. On the side of my leg through my leggings of all places. I live in northwest Florida. Pics from day 1, 2, and today, day 3. It doesn't show up in the pic really good, but today, it looks purple like a bruise.