Take advantage of the experience. Try to use this small discourtesy, if it was indeed a discourtesy, to build up in your mind a more human image of this therapist. He/she is really just an ordinary person, and therapists don't really receive the highest of incomes. They are probably being hurt as much as anyone else during this economic downturn. Think about the therapist thinking the kinds of things and doing the kinds of things that any ordinary person would do. Maybe that could help tone down your anxiety a bit.
Therapists are really just like any other kind of professional: tired more often than they like, starting to feel themselves age, and maybe feeling a little disappointed that their profession isn't EXACTLY what they envisioned it would be. In light of that, it's nice to try to feel some compassion toward them, and treat them with simple, human kindness. Try to smile when you see them, and maybe make a little bit of small-talk. To a therapist, a minute or so of light-hearted chatter is worth five thousand years of hearing about someone's inner turmoil. They're bombarded with that stuff every single day, and it gets really repetitive after a while. It's easier on you and them both if you think of them as PEOPLE, flawed and confused like anyone else, rather than these sinister gatekeepers.
By the way, as a transsexual, I count myself very lucky. You know, my problems are relatively easy to fix compared to someone who suffers from some terrible mood disorder. I'm very fortunate compared to most people who would go in to see a therapist. When I get my license, I might focus on GID for just that reason: I think it would give me a lot more job satisfaction than other concentrations.