Without knowing your personal situation, it is difficult to know what questions to ask.
I suppose you have read in detail about PF and then considered how your personal crises developed?
For instance, in my case, I think the MW who looked after my ante-natal care was neglectful so my situation should not have deteriorated to the point of severity without medical intervention. After it was picked up and by then it was acute PE, there were other failures while in hospital which led to a very traumatic experience and PTSD.
For me speaking the medical bodies was a waste of time as they were defensive and were quick to stress that they had 'stuck to guidelines'. so the individual that I am felt ignored. Like I was ignored and patronised when I alerted the staff to my difficulties. In fact there was more than one case where they did not stick to their own guidelines but handily for them, these were not recorded in my notes which in some parts were works of fiction.
Notes can also be written so dryly, it sounds like it is not about you which can be alarming so be ready to experience a range of emotions. Definitely take someone with you. Maybe someone from the Maternity Liasons Team (a mum) or from the NCT or a reliable friend.
It has been a long road to healing but you can get there.
Have you spoken to anyone at the Birth Trauma Association? Another idea is to contact AIMS and ask for information on how to go about the debrief. Their website may also contain articles in particular to PE and HELLP.