Do you mean under the shamanic model? I’ve read of issues being successfully healed using soul retrieval techniques. E.g., you can call a version of you that “left” when you were traumatized at a certain point in your life “home” and reintegrate using trance state journeying meditations. Shamans can do this for people.
There’s also a related idea that comes from the new age community, that there are points when you almost die but don’t, called a “pseudo death” which can also cause significant changes in personality as some parts of the psyche die and others don’t. This I would say is related to the intentional act of “rebirth” rituals, including the Lake of Fire ritual by Koetting. You are in this case killing the old and unwanted to allow room for the new, in a controlled way.
But you had a lot of trauma and I would agree may be under attack from something that’s actively trying to kill you.
As well as the above to apply faster healing to your energy system to compensate, if the following draws you it might be related - given others in your family are involved… you might want to consider adding protections and shields to yourself and those who are left, your pets and your cars and dwellings.