I stopusing my nuva ring on sept 22nd, had a period that month, and had one oct 12 -17. no in november, unprotected sex on 12/1. could i have ovulated?

Yes: Once the ring is out, ovulation, if it is occurring, often occurs better just after stopping hormones. Two weeks after stopping nuva ring ovulation may have well occurred. If I am reading correctly, you might need a pregnancy test. An ovulation predictor kit can tell you if you ovulate if you had a previous condition such as pcos. Good luck.