CBT is a good method for treating OCD. Does your therapist suggest finding someone who can do CBT with you? It sounds like she doesn't consider herself to be qualified to do CBT because it isn't what she was trained in. Some therapists stick to one method and theory more rigidly than others, and some therapists are "ecclectic" and will try any theory and method that they feel will work best for you.

There are also some good books that you can read and to some extent even treat yourself with CBT. Particularly books by David Burns are good because he writes for patients to teach you to use CBT to help yourself. You can do it with your therapist's help too. If you can't or don't want to find another therapist who does CBT, would your therapist be willing to support you in working through books like those?