I've got some kind of PTSD too MEwithME mine is from medical trauma / life saving surgery but also wonder about CPTSD as well, my family was pretty dysfunctional growing up.
Have you looked at the website Out of the Fog, and Out of the Storm, online they might help. the NHS referred me to talking therapies but when the referral came through it said something about high intensity CBT for hour long sessions so I cancelled it, thought I can't face that right now, either the energy and also I have done CBT before.
I wonder about some kind of general counselling, but wondered again about time / energy and cost as well. I can imagine it might feel the same for you, especially with work etc but maybe in future that might be helpful.
It must be really challenging keeping it all going with your work and son, and you need / deserve someone to offload to as well. You always can on here, or PM me if you want. Kind thoughts.