This is an example of cognitive freeze response that isn't your classic social anxiety freeze. The fun part about doing a titration is you never know if it's your wean or your disorder causing the problem.
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.