-What exactly do you think is causing it?
-Could you circadian rhythm been altered with the accident?
-Can you sleep better at certain times of the day?
-Do you have sleep apnea?
-Have you had a sleep study done?
Personally I've had severe insomnia in 2 different cases.
1. Running tren simultaneously with a very stressful time at work. Got through the work issue and learned to drop work the second I walked to the door. 10 minutes of daily meditation (done correctly) and engulfing myself with the things I enjoy most did wonders. Tools which I still use today. Always stay calm and mellow. Stay below a 3 out of 10 except for gym time. I also had to stop wearing headphones while working out. Couldn't get the music out of my head before bed.
2. Shattered my knee due to a 20' fall directly to concrete. After surgery, my recovery allowed me many naps and would sleep when I could. This really messed up my circadian rhythm once I was able to return to work. I was running ghrp as well so lethargy was terrible. The naps and irregular sleep contributed to my insomnia. As hard as it was, cutting out napping, all stims, and using my bed for nothing other than sleep and sex helped a ton. I used the DSIP peptide right away but switched to melatonin after a month or so. I went from not getting any meaningful sleep, to 30 min at a time and gradually increasing to the normal 8 hours with a bathroom break or two. Not sure if any of this will help but whas what I personally delt with.