Hello, I've been taking the Nuva Ring for a few months now. And I was told to put it in on the first day of my period but this time I put it in a week or two earlier, and now my period is late. I expect my period on the 15th, and I put it in on the 5th I believe. I took it out last night because the day is the 19th and I still haven't gotten my period. Could I be pregnant!? Please help.