If we don't know we're able to do something, how much effort will the mind use trying it?
If we know we are able to do something, how much energy can the mind justify using to accomplish it?
Healing the brain / body / mind operation from psychological trauma is a tempering process.
The damage we're now healing may have happened fast and set in automatically, so the survival brain looks for healing to be automatic and take about the same amount of time as the damage took to occur.
This however is not the case, psychological healing takes time, space, our own active participation, and rote repetition.
The neural pathways of the human brain strengthen the actions we reinforce under stress, meaning the action we take when our stress response is activated, the easiest thing for us to do is default to familiar patterns the survival brain has used to survive similar events. This is why routinely practicing healthy coping measures is crucial in healing.
Understand this, no matter how good you get at recovering your higher mind operation through stress, it will always get knocked off line by more stress than you have developed your ability to withstand. There's noting personal going on here, this is our human stress response system working efficently.
Develop you ability to regain a sense of present moment awareness through the survival mind's circumstances. Realize when you are observing your system operating in the present moment. Each rep in realizing presence is Self directed neuroplasticity, and a rep in healing.