I am sleep deprived help!?

I am a really active 18 yr old and need 9 hours of sleep per day but only get 6 and i am going kinda mental, i usually go to bd at 11:30 if i go to bed at 9:30 for 2 weeks Straight will i be alright again? and hopefully my dark circles will go. I feel awsoem when i get lots of sleep atm i feel crap.