When will i get my period?

Im 12 and like my breasts are a bit hard (If you know what i mean) and they are pretty small, like i have to wear a bra with a little padding or else it will look really weird, and i cant fill a bathing suit. but i am still really short and kinda chubby, and will i hit a growth spurt and lose the extra fat? (and its only my stomach that's big, nothing else cuz my arms and face are pretty skinny)