I have ocd. can i have major depressive disorder too?

You sure can: OCD is an anxiety disorder and depression often comes along with anxiety. I would talk with a licensed psychologist or therapist that you can trust to help you work through these struggles. Be well,

Absolutely: Obsessive Compulsive Disorder confers vulnerability to experiencing a major depressive episode (and hence having major depressive disorder). This may be result of the psychological distress and/or life role impairment that OCD causes.