I got stung by Yellow Jackets today..Painfull!!!!

Dam!!! I was just grilling some burgers and while they were cooking, I decided to pick up a Hoe and was using it to rid of my weeds behind the grill. Little did I know that there was a yellow jackets nest in the ground!! I got stung 2 x 's at least.and as I write this, I'm leg is in throbbing pain now..with a bag of frozen vegetables on it , to keep the swelling down!!!