Thanks for asking, they stem from (as I discovered last year) previously undiagnosed Inattentive ADHD. Mainly.
The hamster likes to keep running on the wheel, even though I’m on my arse, haha. I did have insomnia due to truly horrendous Restless Leg Syndrome for years, but stopping smoking ceased that. Since then, I believe working nights for a while really messed up my circadian rhythms, and I’ve never truly regained that quality of sleep: it’s usually a struggle to stay asleep for more than a few hours at a time, and then by about 5am I sometimes just give up, as I have to be up at 6:30 for the kids anyway.
Seems you’re doing everything right, in all fairness, mate. There’s nothing to pin it on, from a lifestyle or environmental perspective.
As for the Valerian, perhaps it’s good that I stopped taking it last year, as I too have an ectopic arrhythmia. Didn’t even realise that.
At the minute, I’m using sensory aids like rain sounds, temperature control, sometimes a cold-ish bath or shower (recommended) and a Polish supplemental liquid called Amol, which is quite high in ethanol content, but 6-10 drops of that in 100mls of water usually enables me to actually get off to sleep.