I was on the pill for a year and recently switched to nuvaring. I put the ring in on the 2nd to last day of my last period and took it out 3 days ago and I haven't started my period yet. On the pill I normally started about 2 days after I took the last active pill. I thought the hormones were the same so I would start at the same time? I haven't had many cramps or anything . Is it normal to miss a period? Could I be pregnant?