I got the implant (Nexplanon) about two months ago, and I haven't had any noticeable major side effects. I had my period on time the month after I got it, but now I'm eight days late for my period. I know that the implant can stop your periods entirely, but how quickly does this happen, and is there any chance I could be pregnant (as I have had sex without a condom, but about a month after I got the implant)?