I think i had a miscarriage but im on the nuvaring and have taken 2 pregnancy tests and they were both negative. i had light pink bleeding.

Why do you think so?: If you are on birth control, using it correctly, and have negative pregnancy tests...then why would you think you had a miscarriage? Irregular bleeding/spotting episodes are common, and can be red, pink, or brownish. Doesn't sound like you have any reason to worry that you had a miscarriage. Keep a calendar of irregular bleeding episodes and discuss those with your doctor if they continue.