Hi Lexa,
in my understanding, people develop c-PTSD due to a prolonged or repeated trauma from which they had no escape, especially if it occured during their formative years, while PTSD can be due to a single traumatic event or events that occured during a shorter time period. Kers is right that dissociation is common with c-PTSD. To me it makes sense, if you can't escape and some trauma happens over and over again, your mind really has no other way to find relief. But once you're safe, dissociation is a coping mechanism that is no longer helpful and instead it prevents you from living your life.
I have c-PTSD and have been in therapy for years. I feel like I am making progress all the time and then I always discover something new to work on that was out of my awareness till then. I do think I am getting better, even though I am still struggling. There isn't any simple cure, but there are many things you can do to help you heal and develop as a person, starting with learning how to be present. Your therapist might be able to give you some strategies for that.