Hi, Stephy...Well I know little to nothing about the Nuva Ring, but it sounds like you are pregnant. I know what you mean about the home preg. tests, I don't trust them either. I have had them read negative when I was pregnant! Sounds like you should go see your OB/GYN! I had morning sickness with some of my pregnancies but not all of them. I also experienced dizziness, lightnedness and headaches in the first few weeks of pregnancy...some things to keep in mind and look out for!
Tender breasts is a really good indication of pregnancy but it can also be a symptom of your period coming...so, you need to find out for sure. The earlier the better for you and the baby too...if your pregnant, that is!
Well, good luck...which ever way you are hoping this will go.
D. R. :)