I Was Stung By A Wasp Yesterday While Golfing And

I was stung by a wasp yesterday while golfing and wasn't able to do anything for 5 hours. I took 2 Benedyl when I got home. I have soaked the sound in Epson salt and baking soda with vinegar and it hasn't improved. No temp or bad feelings other than tightness in the thigh with a little itching or burning. It has spread 2/3 of my thigh.