There are a group of different symptoms associated with ptsd. At the same time, how they surface will be as particular as you are. For me, I had been shut down for so long, the first sign of emotion was a deep deep sadness that had nothing to do with what my life was at the time. I felt like I was about to drown with sadness, and I didn't know why. Then bit parts of memory started coming through, either images or words or just these very powerful un-anchored emotions. I felt very shattered and lost and didn't know what was going on.
At first it was a relief from the 'not-real' feeling, but it was overwhelming. There wasn't a lot of talk about ptsd then, so I blamed a lot of different things -- my spouse, my job, social justice : - ) and store clerks -- then just thought I was entirely crazy.
It's a really good idea to read up on the symptoms, so you know what you're walking into. The first book that I found that helped me know what was going on was Judith Herman-Lewis "Trauma & Recovery." Plus this site has a lot of information. If you don't want to read a lot, you can probably get a list of symptoms by googling "ptsd symptoms."
It's really good to go slow and be as gentle as you can with yourself and the symptoms. I just threw myself at it, and I wish I'd been more kind. Take a break as you can, find the things that give you comfort: hot baths and walks and chocolate and music. A good therapist who really listens to you and knows ptsd. This forum.
xo lr