Can birth control cause depression?

I've been on the Nuvaring for a little over 2 months, and I'm not sure if im just hormonal or depressed.. I feel like my days are blurring together, and when I think about the last month and how repetitive my life has been lately i cry. I really like the flexibility of not taking a pill everyday, I want to keep this plan, but im not sure if its worth it.. anyone else experience this with their birth control?