Hey, I know what you mean. I actually didn't have major breast development before I hit my period, or as a matter of fact, after I was on it. It was hard for me because I had no cramps or anything to let me know that my period was coming. I think you should ask your mom about buying you some pads, that way you'll have time to get comfortable wearing them, especially in school. Just remember that you aren't alone and this is something to be proud of. You are becoming a woman, and that is nothing to try to hide, but I don't recommend flaunting it either. I wish you luck with your problem.
Sounds like ur period coming. Or it is ur period. I really don't think there is away to tell exactly when ur period will come.. and just bc ur Mom had it at 14 doesn't mean u can't get it earlier Ya know? I was 11 when I first got mine. N think my Mom was like 12-13 so just depends on ur body n if u have breasts. Ur starting puberity