I can't sleep... Huge bags under eyes!!!?

Ok so for the past week or so it's taken me over 3hrs to fall asleep. Last night though I didn't sleep at all. I'm so tierd... I've tried taking a nap but even then I can't sleep. I'm still a teen so should I be worried? Everythings been normal, and I'm pretty sure it's not hormones. Thanks for any help or suggestions on what to do.