I ended up going to the doctor this afternoon. It looked worse today and I could barely walk last night it hurt so bad. The doctor said it wasn't an allergic reaction but rather I now have an infection. Yeah. Got some antibiotics and hopefully in a couple days the leg swelling/itching/burning pain will settle down and I can try and run or bike again before my race next weekend.
Here is the best pic I took of myself, it doesn't look that swollen but imagine that my actual ankle bone sticks out on the good one and on this leg I can hardly see the bone. I got stung at the top of the red blotch thing (towards my knee) which is actually more purplely.