Just as with birth control pills, if you started using the Nuva ring on the first day of your period, there is no need for backup contraception. Starting at any other time, even later during your period, requires 7 days for full effectiveness. So your chances are about as high as if you'd had unprotected sex (which you actually did, since the nuva ring was not yet effective.).
Those chances would be 15-25%, depending on where you were in your cycle. Since you can't remember when you last had your period, you'll have to assume the higher percentage applies.
When you can't get pregnant, and things look good from the outside, it can be extremely frustrating. Anyway this is a great method to get pregnant: https://tr.im/H23ct The first thing to consider is how long have you been trying. About 80% of couples will get pregnant after six months of trying, and about 90% will be pregnant after 12 months of trying to get pregnant.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.