Hide and Seek

Eva
Has anyone's cycle ever done this "hide and seek" thing like you come on your regular cycle as clock work then suddenly, nothin for a month? My cycle is doing it now like on here it's saying I'm late and I mean LATE and another app I have says it's fine and next month I'm supposed to come back on my regular cycle. Let's just say the day after my last cycle Valentines Day me and my bae got it in major, he only pulled out once and not the other times he came, which clearly goes to say I'm not tellin him pull out but now I'm about 16 days late one friend of mine says get on BC (I don't want to I hate the possible side effect, been refusing it since I've been sexually active), my other friend believes I'm possibly pregnant. But has anyone's cycle ever done that?