Mine are this bad at times they also manifest in my dreams
The thing I stick with is therapy. But at times focusing on trauma therapy was too much and overwhelming so I work on many things. Have you tried EMDR? Or any therapy?
Mindfulness work and grounding are helpful to bring you to the present. But I understand that snowball affect in your head, like a thick ptsd fog you cannot shake from. Exposure therapy and figuring out triggers and managing them can help. Dbt therapy helped me understand unhealthy ways of thinking. Group therapy is also good if you can find it.
Medication can help manage stress and depression but everyone's different.
I understand how awful cptsd and flashbacks can dominate your mind and shatter your nerves. I hope you can find some relief in something and feel free to message me if you want.

@judemilo7070
You are 100% right. I cannot control the thoughts in my head that are there all the time. Therapists say, let it go, forget about what happened that caused you to spiral downwards. Yeah, right, if I could do that, I would be a miracle worker.