My periods have been so irregular.. Off birth control my period last for 5 days sometimes less than that and it start on the same day every month but on birth control; take last month for example I was 10 days late and now that it's started I've been on it for a week and a half.... It's driving me crazy I was on my period for the entire month back in December.... Ughhh! Does anyone else have this issue with (implonon/nexplonon)? Is this something I should talk to my doctor about??