I received 3 bumps on the inside of my right wrist 5 days ago-they appeared to be bites, however I don't remember feeling a bite. One swelled to a blister appearance the size of a dime and they itched. The largest one is now just a red dot, but whenever I put pressure on it, it shoots a pain into my wrist (as if there were a stinger in it-but there is not). The past 3 days I have experienced chills and every joint in my body has severe pain and stiffness. Do u think I may have been bitten by a spider and besides an over the counter pain reliever, is there anything I can do?