What are these itchy bumps, and why are they appearing all over me?

This started last week. I woke up one morning to find a red line of bumps down the middle of my forehead, and I thought that maybe I had scratched it on something, but then later, the bumps started to itch. I just want to know what they could possibly be! I'm not allergic to anything, and it's not poison ivy. It seems that every day I wake up with more bumps! I now have a bunch of then on my head (the line on my forehead, one on each cheek, one on my jawbone, one behind my earlobe, and one on my ear), a group on my shin, and i just woke up from a short nap to find a group of ELEVEN on my foot!! What is happening to me?