I terminated the last one after one trial session. A friend tried to suggest I give the person a little more time, but I was losing sleep over the idea of going back and that was my cue to cancel (which I did in a voice message and she called back to thank me). With another, I canceled before the first appointment after reading more about her. When I called, expecting to get a voice message, she answered. It was really awkward on her end--she was clearly confused and not happy about the cancellation and it was like pulling teeth to get her to explain very clearly what kind therapy she provides because I was not drawn toward the kind I was reading about in her website materials. With others that I have tried, I went maybe 4 or 5 times before calling to cancel. They did not reply.

I like Echos' suggestion that you can change your mind later and go back.