eek!
How strange that this is your first allergic reaction in your life. I get swollen for days with just a mosquito bite.
I have to carry an epi-pen. I haven't had a bee sting since I was a kid, but the allergist told me I'm very allergic to them now and I better carry one just in case I get stung or I might go into anaphylactic shock. Ummm.... OK