Just continue taking your pills exactly on shedule. Nothing to worry about

Take the sugar pills as usual and then start your new pack when you are supposed to. While the pill does keep you pretty regular, its not impossible for you to have early or late periods. The best thing for keeping yourself pretty regular is to not change your pill schedule. And you are new to this pill - 3 months isn't long, so your body is still adjusting to it. Don't worry - you aren't going to mess your body up in any way!