Is there a way to treat ocd with just therapy and no medications?

Yes: Many people with mild or moderately severe OCD can improve with exposure therapy or cognitive behavioral therapy. It is important to have an experienced therapist.

Meds and therapy: Meds (usually antianxiety medications, but not always) combined with therapy with a clinician who specializes on OCD is the best combination to treat OCD, typically. This is the best treatment approach for OCD, but it does not guarantee a cure for it. Usually therapy focuses on emotional issues behind the OCD which generally involve unresolved issues of anger or fear.