Peaches - I have an experience I'd like to share with you. I did the same thing you did with my own therapist at the time. Fortunately, I had two - one for addictions and one for trauma.
I talked to my trauma counsellor about what was going on. It still wasn't feeling resolved.
This had been an ongoing pattern for my for years. I finally went to see my doctor and bared my soul, told him exactly what was going on. He perscribed Prozac. Within a week I felt so much better.
What I am saying is that it may be something chemical in your brain which is doing this. It may be worth to talk to your own doctor about it and see what the options are.
Your not whining - your in distress. You deserve to get help.