Yesterday afternoon I was stung by a wasp just above my ankle. We pulled out the stinger, and it swelled, seeming completely normal. Today I woke up and the swollen area was bigger than yesterday. After work I noticed it was swollen all the way down my foot, almost to my toes, and up my leg , about half way up my calf. It's tingly and very itchy. I'm worried that this isn't normal .