Sleep help!

I’ve been running a cruise at the moment to get healthy and also fix my sleep. Nothing I do seems to work. The only time I can sleep for ages is when I take pregab - but I use it very rarely. My current sleep stack:
Mg glycinate
Ashwaganda

I don’t have any issues falling asleep, but staying asleep is next to impossible. I’ve reduced my caffeine intake also.

Any Suggestions?!