Anyone use Nuvaring?

Hi everyone, I have a question for Nuvaring users. This month I took my ring out on March 5 after three weeks of having it in. By Tuesday my period started and lasted three days as usual. Because of stress, my schedule, and just life in general, I accidentally put my new ring in very late on the 16th. I know that if you put new ring in late you're supposed to wait seven full days before having unprotected sex.. Well, my hubby and I ended up having sex a week later on the 23rd early in the morning. Two days later I started feeling dizzy, I had terrible hot flashes, sore breasts, and bad cramps. I decided to take the ring out on Sunday the 27th because I was feeling so strange, didn't know if it was a side affect from the ring or if I may be pregnant... I have NEVER had sore breasts while on the ring and I have been taking it for over six months. It is currently Tuesday the 29th and I am still cramping with no period and have mildly sore breasts. Could these be early pregnancy symptoms, or am I overreacting?