It is frustrating me as I did that GT I took the nytol for a few days, got myself in to a more reasonable pattern of sleeping, stopped it, was fine for a couple of days, and now back to square one. Definitely taking it tonight. I didn't take it til 5 last night as I kept thinking Oscar would wake any time, and it seemed pointless I suppose. But then desperation kicked in!
I am very frustrated - I only used to be like this post night shift insomnia! Perhaps it is the waking in the nights that is causing it.
If it continues for another few weeks I might go and speak to the GP. However I am reluctant to do that as I don't believe proper sleeping pills to be the cure. Plus I can't take anything that knocks me out completely for obvious reasons.
The nytol is herbal stuff, probably a placebo, but hey, if it works, it works! It just says don't take for more than 7 days without seeing a GP. However I haven't taken it for 7 days, but have taken more than 7 days worth in the last few weeks. 
I've done the whole milky drink, warm bath, wind down, no screen time thing. Sometimes it works, sometimes it doesn't. Ie. it makes no difference really, as some nights I can sleep fine anyway, some nights I can't.
I'm my own worst enemy sometimes.