That's usually not a big deal for me. Because i'm never EXACTLY on the day. But i usally start 27th to 30th.
is that normal? to be late? i'm only 14 and i've been on my perios for 2 yrs. So it's not like i'm still getting used to it. I don't have sex or anything like that or do drugs etc. So i couldn't be pregnant or having some kind of drugged out side affect. (i don't even know if that's possible)

what should i do?