CTB is cognitive behavioral therapy. Basically changing how you respond to different things. Here's more information on it: http://www.nacbt.org/whatiscbt.htm. You can also do a Google search.

Also, the doctor is wrong. Meds do work for OCD. Many people with OCD use them...Here's something about that: http://www.ocfoundation.org/ocd-medication-adults.html.

Hope that helps!