So I’m 12 and I’m a virgin and I have had 3 periods so far. They were all regular and they came when the app said so. Now this is supposed to be my fourth period but I’m late. According to the app I am 9 days late and 9% chance of being pregnant. Which I know makes no sense since I am virgin and have not done anything with a boy. But I’m still scared as to why my period is late. Can anyone please give me some advice.