I need sleep

lately I have trouble sleeping...
it's like my mind refuse to shutdown although I know that my body is tired...
sometimes I feel that there's so much that I can do with the time I 'wasted' by sleeping...
I know it's not healthy...human does need sleep...
I didn't sleep last friday...I stayed awake for 45 hours...
firstly i didn't sleep that time because I was playing PC game...'rise of nations' cool...but then even after that I didn't feel like sleeping...
went to play ps...then play laptop again and at night went out to celebrate fendy's going away...even after that I still stayed awake until 3 AM playing laptop...
usually, I'll sleep about 12 at night on a school day...but these last few days I have trouble doing that...
maybe I'm having insomnia or something although I doubt it...
maybe it's just me afraid of losing precious time...wanting to do things that I know that I can't do anymore in the future...
maybe...
I just need some sleep...