i have been on NuvaRing off and on for 2 years now. I just recently got back on it a week ago and now I'm feeling sick (like I'm pregnant). I have had off and on headaches, nausea, and lose of appetite. I'm getting scared because I don't know if i could be pregnant or I'm having the same side effects as everyone else, but if it continues, this will be last time using NuvaRing!