Because you say this started largely after a traumatic event, your symptoms sound strongly of overwhelmed adrenals. Probably they were already weak, and the event crashed them. Now you cannot recover.
I think you would benefit from direct adrenal help. That's more than we can offer here. I will give you a link to an Adrenals group I have experience with. You join, and then present your problem. They will ask questions and likely ask you to do a salivary cortisol test and to get blood work done. You may also need companion thyroid support.
Recovering your adrenals can be tedious, but rewarding. I encourage you to read their Daily Digest, as reading about what is going on with other members can help you with yourself.
Best of luck! You can reverse this, but not overnight.