Was stung twice by wasps one week ago. One site still itches just a little but looks fine. The other sting, on the under side of my forearm, is still swollen, red, hot to the touch, and at times very itchy. Have felt fine, it really did not bother me until yesterday. I am conscious of it all the time and it just feels strange. What should I do to treat it? I have a routine appointment with my doctor in three days, is it okay to wait until then to have it seen?