TLDR: Bi-polar make me manic and not sleepy, how do I sleep without meds? 

This is like half asking for advice and half venting. My work schedule starts at 4:30 am and I can never get enough sleep. I feel like I lay in bed and stare at the inside of my eyelids for hours, just to open them and it be 1 am. AND I feel like it’s worse when I know I have to work. Which leads to me getting maybe 3-4 hours of sleep a night and then I do it all again. Honestly I’m drained and exhausted but I’m not at a place in life where I have access to meds or health care. Anyone have tips for getting yourself to fall asleep or go to bed at a reasonable time? Or is this just being manic and stuck with insomnia and I need to get medicated?