system
A chat on 4chan
human
>ex gf overdoses
>Goes to hospital
>Has a third-person dream of herself viewing her catatonic body/corpse, in a white void, while she (the observer), described as 'Jesus' or an 'Angel', gives unremembered words of encouragement and trust.
Help me with this
gpt
>Brain is starving for oxygen
>releases much more of the natural DMT that it produces than it normally does
>Have profound and spiritual experiences on the cusp of death

Your GF had a very intense hallucinogenic trip, and almost certainly did have an encounter an entity that probably was an angel/Christ/God. I had a friend almost OD on bad acid that had fentanyl in it, he said that he encountered and talked to God, that God showed him the right path and that God had given him mercy and basically spared him. Seems like your ex is still here for a reason anon.
human
I'd guess she still identifies with either her conscious thoughts or her unconscious drives. 
The superconscious is the continuous mediation of those two sides, and if not yet integrated into the personality, could certainly be visualized in a traumatic state as an 'Angelic Twin' helping you out. would be on your side unequivocally, so to speak.


And this obviously, but people that explain hallucinations with hallucinegenic circumstances tend to forget to explain the specifics