Thanks for bringing your question to JustAnswer.
Actually, it would be good for your doctor to know about the OCD symptoms, as certain meds can help that symptom as well as the depression.
Here is an excellent article that will take you through the steps to rid yourself of this repetition: http://hope4ocd.com/foursteps.php
It would also be good to find a therapist who specializes in Cognitive Behavioral Therapy.
( Quoted from NAMI)
Cognitive-Behavioral Therapy (CBT) is an empirically supported treatment that focuses on patterns of thinking that are maladaptive and the beliefs that underlie such thinking. For example, a person who is depressed may have the belief, "I'm worthless," and a person with a phobia may have the belief, "I am in danger." While the person in distress likely holds such beliefs with great conviction, with a therapist's help, the individual is encouraged to view such beliefs as hypotheses rather than facts and to test out such beliefs by running experiments. Furthermore, those in distress are encouraged to monitor and log thoughts that pop into their minds (called "automatic thoughts") in order to enable them to determine what patterns of biases in thinking may exist and to develop more adaptive alternatives to their thoughts. People who seek CBT can expect their therapist to be active, problem-focused, and goal-directed.
To find a therapist skilled in CBT use this link http://therapists.psychologytoday.com/rms/prof_search.php and look for therapists who specialize in CBT.
It is important for your MD to know about the obsessive tendencies, as he may be able to chose a medication that can address both your depression and obsession. http://www.medicinenet.com/obsessive_compulsive_disorder_ocd/page2.htm