Headache, Headache, Go Away

So, I'm not sure if it has anything to do with the new energy pills I've been taking (and if so I hope the side effect is temporary because otherwise I'm totally enjoying the pills), but I've had this wicked headache for the past few days. In fact, earlier today half of my head actually fell asleep. What on earth? I've had my feet fall asleep before, even an arm, but half my head? I went to scratch my head and it was numb. Is that normal? I'm kinda feeling like a nutjob. Well, more so than usual, that is.