HARD TO SLEEP AT NIGHT!? I WAKE UP ALL THE TIME!? HELP!?

Hey there! I'm 17 years old. And this has been going on for a while now, this isn't new, it's been this way everyday! Whether I sleep late or early. I'd fall asleep easily, but EVERY hour I wake up about 2 times! It's not like I wake up of hearing something, I just wake up like that! I move around and can't seem to get comfortable at times! ANC this annoys me because I'm a very light sleeper, if someone drops a pen next to me I'd wake up! And I wouldn't be able to sleep. But it's gotten to my attention that I wake up all the time!! And this doesn't happen to my siblings, i don't know what it is. And I don't even eat before I sleep all the time. This is very annoying and I want to know what it is. Please help me! Thank you and have a great day! :)