Have you been tested for sleep apnea? The sleep trouble might be physical in origin. A big tell-tale is people telling you that you snore horribly.

While not always the case, a thick neck and highish BMI can also be indicators. Just a thought here. I think you should talk to your doctor and enquire about physical reasons you might not be sleeping.

Also remember to practise good sleep hygene - which I apologise if you are already doing. This involves absolutely no screen-time in the hour or two before bedtime. This starts with removing TVs, phones, tablets, etc from the bedroom too.

Consider your diet especially that which you consume later in the evening and at night. Stay away from those things which require more effort to digest.

While these are obviously no fixes for sleep trouble related to Anxiety and PTSD they should lessen the impact.