I have been on nexplanon for about 6 months and my period stopped completely with the occasional spotting. I have had sex both without and with condoms while on nexplanon. On august 9th i had protected sex with someone i met at a concert (a one night stand) and he lives in a different state. I regret the decision i made to do this so i am wondering if it would be safe to take the plan b on nexplanon.