(((time0))) Not all PTSD sets in immediately. You might not have been dealing with what happened at all initially, you know?
Be gentle with yourself...but do continue therapy for this. The sooner you can work through it, the less work you have to do, I think. It doesn't go away on it's own.
You ARE communicating. Guilty feelings, isolation, blocking those are all coping mechanisms brought on by PTSD. It isn't like you have total control, you know? (((((hugs0))))