I've been on nuvaring over 1 yr but lately I'm getting more and more emotional/depressed 1-2 weeks before period. Could this be the birth control?

PMS. Pre menstrual syndrome affects 30 million women in thne U.S.I, a condition of the part of the brain known as the limbic system. It is a computer that enables us to adapt to envronmental change and is the seat of our emotions. It also controls the period cycle. I would suggest d/c b.C., remove all vestiges of sugar from your diet and take a well rounded multivitamin + b complex + magnesium.
Possibly. Hormones can affect your mood, and it can be due to the nuva-ring. See your doctor, and perhaps try an antidepressant or change your birth control.