I have been on Nuvaring over a year, never got a period unless it was taken out for a week because of hormonal changes, a period was needed. Never gotten brown discharge while being on the Nuvaring, now I m worried about pregnancy even with protected sex, and I changed my ring about 4 days ago. Period symptoms of one ** never get the blood part** should have ended over a week ago.. But, time to time I get what seems vaginal discomfort/cramps. What could this be?