i started using the nuva ring 9 days after my period ended then i had unprotected sex 2 days later but i used plan b i cleaned the old one and then put it back on then i had sex 8 days after having putting it back on again.. since my doctor told me to wait 7 days after so it can start working....what is the percentage of me getting pregnant and why do some people say to wait a month after starting the ring