What Causes Itchy Spots On Legs With Sore Throat?

I had spots on my left leg last week and I thought they where spider bites. They have stopped itching and are going away. now I have itchy spots showing up on my right leg and my throat is sore. One thing that im worried about is that I got a tick bite about 2 weeks ago, but I got the whole tick out with in hours, so I don't think that is it. any ideas?