I don't have any medical conditions, so I can't address your personal ones and sleep. I have only old age. I'm post menopausal.

Personally, I do take HRT (estradiol 1mg daily) so I don't have hot flashes. As for sleep, I retrained my brain to stop thinking once I go to bed. I have a favorite instrumental song which I replace thoughts with until it puts me to sleep. In other words, I play music in my head so I won't think.

In the old days before I retrained myself, I tried taking melatonin and hated the way I felt the next day. I had better luck with the night-time pain reliever pills (all brands are blue in color).