im 5 foot 1inch and i way 160 and i dont have my period is that bad!?!? :$
Just because of the certain age doesn't mean that some thins are going to happen, some girls start and end their periods earlier and some later. At 13 you are not yet in the group that is considered late, depending on the other puberty related changes, also, but even on the age alone. Also, one of the important things that can tell when you are going to get your period is the time when your mother, sisters or other women in family have gotten theirs. And no, the weight itself doesn't have this kind of impact on your period, unless you gained it all in last two months...