I wish I could help with some suggestions. I never had any sleep issues until my first child was born. Since then, sleep has never been the same for me. By the time I was 30 I was taking medication to sleep and have done so for all these years. I've always required a lot of sleep, and to my knowledge I've never experienced the lack of need for sleep that bipolar disorder is supposed to sometimes cause (which could be due to being medicated). But, my sleep is always broken - although I seldom have difficulty falling back to sleep after I've been up and about for awhile.
The biggest problem I've had with sleep is when I don't take a med to sleep. Then I experience that miserable feeling of being somewhat awake while I'm asleep.
So what I'm trying to say is that I believe medication affects my sleep (causes me to need a lot of sleep). Were I not on meds I don't know how my sleep would be.