abnormal uterine bleeding
"I used NuvaRing in response to not having a period for three months, having horrible constant cramps, PMS like moods that never stopped.  Before NuvaRing I was not on birth control.  Two or three days after inserting NuvaRing I developed hideous acne on my previously perfect skin and felt extremely dizzy and a little nauseous.  I immediately removed it without consulting my gyno.  My periods returned with me now using super plus tampons instead of super.  I got tired of looking at all the blood.  Cramps improved mildly.  My mood was still off.  I went to a clinic months later and they informed me that NuvaRing produced blood clots.  I was instructed to take aspirin to thin my blood and couldn't so took Tylenol instead."