Definitely post your blood tests, as your dose may be very wrong and/or this might improve once you've raised it to the level you need.
But in terms of insomnia, a few things that have helped me:
- Get hold of plenty of audiobook, podcasts and recordings. This means there is something to do besides feel stressed out during the night.
-Try out all the sleep hygiene techniques you can find, as some of them work some of the time. I found it useful using my bedroom only to sleep, and also to spend an hour or 2 winding down, turning the light out at the same time every night.
- One reason for waking up can be low blood sugar which becomes a problem because tired adrenal glands can't provide the energy needed to stay asleep. So if you feel hungry in the night, eat something. I end up eating oatcakes and sometimes cheese. Recently found som claims cheese can help you sleep. I also often have a snack before bed. Some suggest orange juice with salt in it is a good miss to support the adrenals during the night.
- Mindfulness exercises during the day. I tried this for other reasons, but my sleep almost instantly improved, if I skip for even one day I now notice the difference (I now sleep all through most nights). I originally used the book 'Mindfulness: A practical guide to finding peace in a frantic world', it comes with a CD of recorder exercises, the mobile phone app Headspace is also a good start.
- Magnesium at bedtime. I had right, restless calves that wouldn't settle down, so I use a skin spray, and baths with Epsom Salts as a top up. You need a large quantity of Epsom salts and you can buy them in big bags online. There are also bedtime drinks containing it.
-Melatonin. This was one of the other big improvements for me, I started on 3mg, but eventually got onto 6mg, which is a fairly high dose. But this gives me a feeling of sleepiness, which otherwise I don't really get - if I don't take these I can stay up all night as if it was day. Sometimes can be used to impress friends
- I've also tried assorted other sleep supplements that seem to help. Activecherry seems to be working for me, and I also take CBD oil on nights where I have extra trouble sleeping.