Reading all your responses, I see that it's quite common to cry in sessions. I've only really cried (in session) maybe twice in two years. I have gotten close to crying several times but I hate to show weakness so I put a lot of effort in holding them back.
I do cry afterwards sometimes. I walk out of the office as if I'm put together. Sometimes I get in my car and put my head down on the steering wheel and just cry. When I get home, I usually analyze the session in my journal. I include all the feelings before, after, and during my session. It helps a lot. Sometimes I'll email that journal entry to my T.
The thing that helps the most is when she pulls me in for a hug after session. But when I leave, I automatically start missing her. I automatically start processing. If she doesn't hug me, my first thought question why and what I did wrong.
I'm usually not much good the rest of the day. It's tough.