text: hi!!!   i think the reason why you keep waking up is because there  is something on you mind. when you fall asleep you brain shuts off and if there is something in you brain  that you are "obsessing" over or thinking about allot  then your brain can't fall asleep or can't stay asleep, in your case.  i had this proble  a long time ago. i solved this problem by clearing my conscious. this helped allot!