Abnormal Bleeding on Nuvaring

My friend is worried and she has been on a few sites and now she is afraid. She has been on the Nuvaring for a few years now I believe, and has had no problems with it. I do not know if this would cause this to act like this, but she ran out of the prescription and has been waiting to go back. Two weeks ago she ended her period. Now she says she has had a brownish discharge, even when she is off her period. Kind of gross, but she says it looks like apple butter to compare it to the color.

She has been told by medical sites that she is either pregnant, has cervical cancer or has something else...She took a pregnancy test, and she is not pregnant. They use two types of protection, birth control and condoms...So I figure it would be doubtful she would be pregnant, and she uses her birthcontrol correctly.

She is scared and has an appointment with the doctor on Friday...In the mean time we would like some answers...