IF YOU ARE IN DANGER, CALL 911. Passive suicidal ideation is the constant thought of ending my life. It's always been there controlled by a volume dial I can't access.
The difference between PTSD and cPTSD is multiple trauma. Usually, it happened (or is happening) for a long period of time, and in some cases in multiple areas of a person's life. Due to these factors, there's a change in the creation of self-concept and much more adaptation to typical and stressful life events.