Hello, I don't have PTSD but I do have extreme anxiety and have been in the state you sound like your in now. It sounds like you are being triggered by something and your body is in a constant state of fight or flight causing your brain fog. I would talk with your therapist to try and tease out if it is definitely your work that is doing it?

I think it would be best to try and get to a state where you are sleeping properly and do not experience brain fog before making any larger changes. If therapy is not working try a course of SSRIs if you are not already one, coupled with really focusing on avoiding sugars, alcohol and caffeine, while drinking enough water.

If you experience no changes after doing the above after 4-6 weeks try to put together a game plan for long term change, that will require slow methodical thought about what you need and what your family requires. Best of luck and PTSD is the absolute worst, feel free to message me anytime.