I decided to stop using the NuvaRing and removed it about 3 weeks...

I decided to stop using the NuvaRing and removed it about 3 weeks ago. A very light period started about 4 days later, which was the norm while I had been on the ring. Starting about the day I would have normally put in a new ring, I started to get cramps and an unusual amount of discharge. I've never been one to suffer from bad menstrual cramps, so having cramps well after my light period ended and when I wasn't even using the ring was surprising to me. The pain has been fairly constant for two weeks now, although the discharge has diminished slightly in the past few days. I'm not uncomfortable when I'm sitting or laying down, but the second I stand up the abdominal/pelvic area pain occurs. Could this be my body adjusting to NOT having the ring (I had been on it consistently for over 2 years)? Or could the cramping by a sign of something unrelated to the ring like a pelvic infection, fibroids, etc.? Any ideas and thoughts are appreciated. Might have to take myself to the doctor about this soon.