I have always had issues with insomnia, and it doesn't help that I'm an extremely light sleeper to begin with so when I do get to sleep I do get woken back up again. So while I struggle to fall asleep I also have issues staying asleep. So it sucks majorly. Although I've noticed that since my daughter is so good at keeping me on the move and keeping up with her, that when it comes time to sleep, sure I still have some issues, but I normally do pretty good with falling asleep, but I do wake up to any little noises still.
I've used melatonin, and it does work, sometimes, but not all the time, and I've never been a fan of taking sleep aids, because, especially since having my daughter, I'm afraid I'll not wake up when she needs me. I just try to make do with what I have, I suppose. Some nights are better than others, which help my days go smoother. :)