Cannot Stay Asleep How Do You Stay Asleep?

How do you stay asleep? - cannot stay asleep

I sleep regularly in 15 minutes. The problem is that I can not stay asleep all night without waking up 2 to 3 times viewed. I'm not worried about anything, because I do not remember everything:). I think asking around / Day Dream, Dream, but I am aware. I was almost a month since. I lift my eyes are red and tired in the day.

Ideas or suggestions would be great.
Thanks in advance