Have you asked your doctor to put you on a low dosage of sleeping pills? I started off with Lunesta which did not work too well for me. Still had me up at 3 am. I recently changed to Ambien. IT has worked great for me. I am on a low dosage and started just a few months ago.
I also do mindfulness, stillness, box breathing, and meditation which are great resources. It's very hard to be still and turn your brain off, just for a few hours. But it is necessary. On January 19, 2022, I was diagnosed with stage 4 colon cancer. I am also a domestic violence survivor. I have anxiety, depressions, insomnia, and PTSD. I hope you can find something that will help you sleep. A goodnight's sleep helps for better production for the next day. (: