For a very long time now, since I was a little kid, I've had frequent nightmares. This lessened once I got to college, but recently, I've been having nights where I'll have a series of nightmares. I'll have one, think I wake up, and then it leads into another one. This happens at least 5 times in a row. I'm not sure what this could really mean, but I've been losing a lot of sleep and waking up with headaches.