I had the implant inserted on the 19th of February and yes my doctor told me no unprotected sex for 7 day, however me being stupid got wasted on the Wednesday after ( 5 days in) and had unprotected sex at a party, and my period was due on the 27th which hasn't come yet and I'm wondering is this just period irregularity due to the implant or could I be pregnant ? I've heard a lot of girls don't have periods the first few months when on the implant. I'm only 18, and have no desire in having children at all yes I know what I did was dumb in just really desperately for an answer which is most likely as I'm quite scared, I've had pms symptoms and cramping as I do every month and my period is normally very regular