You started Nuvaring, it can take a few days for your period to start especially when your on yo ur first mornth of Nuvaring. It takes 3 months for your body to regulate hormones.
Now if you had unprotected sex within the first week of being on nuvaring (if you hadn't been on another birth control method before) then it's possible to get pregnant.
I was on Nuvaring for 3 months and had no issues with it.
um u started nuvaring, of course it messes up ur cycles................ thats pretty commen. if u feel u are pregnant take a first response early detection test. use the first morn urine.