Good job for keeping the appointment! You will not see results after just one session though.
I really think you should find someone in person. They would likely spend the first couple sessions getting to know you, not even necessarily asking you tough questions. Then as you became more comfortable, you could start discussing what's troubling you. Over time you would work with the therapist to get to the heart of the matter and what is causing your behaviors, not simply overcoming the symptoms but helping to alleviate the obsessive thoughts. And you can always just print this thread and give it to someone in person.