Whatever the case we fear none But ALLAH... sleep in regular hours and for sufficient hours.. dont think too much of all these... its nothing end f the day.. ...
What to say before sleeping:
http://www.islamawareness.net/Dua/Fortress/028.html

Invocation to say if you stir in the night:
http://www.islamawareness.net/Dua/Fortress/029.html

What to say if you are afraid to go to sleep or feel lonely and depressed:
http://www.islamawareness.net/Dua/Fortress/030.html

What to do if you have a bad dream or nightmare:
http://www.islamawareness.net/Dua/Fortress/031.html

Islaam4u