Mouse,
PTSD is something that never goes away, and regardless how much you try and suppress it, deny it and so forth, it WILL always come back through, each time getting stronger and harder to suppress. This is your mind actually telling you that you need to deal with all your past trauma, you need to come to terms with it, you need to heal from it. PTSD is seperate from your trauma itself, as the trauma caused PTSD, but PTSD is definately a unique entity that must be learnt how to manage in order to control the symptoms themselves.
What you are doing in regards to your doc and groups, is exactly correct, your bringing things to the surface to be dealt with. This is the idea. Yes, you will get worse before getting better, this is also known. You must get worse in order for your brain to learn coping mechanisms in order to beat trauma. Basically, you must go down in order to remain up in life.
PTSD is a cycle, and depending on how you have dealt with your trauma and learnt effective techniques in order to manage the sympoms, depends on how that cycle runs. For example, something who denies PTSD and suppresses it may do so with alcohol, cigarettes or drugs (legal or illegal). Either one, the PTSD will calm. It could then be months or years before PTSD comes back through, though this time it will come through worse than before. So, you may up the suppressant your using to keep it all down. This may, or may not work. If it works, you then continue on life again. Months or years again, PTSD comes back through with all this trauma, even worse again this time, making it more difficult for you to suppress or deny. It will continue this cycle to the point where your mind breaks, to either deal with the trauma or commit suicide. One or the other generally.
Now, dealing with trauma itself raises these issues anyway, so it is either a matter of waiting or a matter of self provoking the trauma to come through with some control. The latter being the better, as atleast you have some control, even though you will feel you don't, you actually do, because your self preparation is known before provoking your trauma to come through and deal with with, generally being the decision you make to actively come to terms with your past, and sticking with that decision, not just jumping off a building or such to die.
PTSD is something that must be dealt with, both PTSD and the trauma that caused it, as the trauma feeds the symptoms. It really is just a matter for a person to come out of denial, say screw it, and suffer the heavy short term pain for months / year whilst dealing with it, then getting some much needed relief and learn management to get back into life itself and live once again. It is all about choice.