Tampons at 12?!

Ava

I've recently got my period last year and I've taken note that i need to start wearing tampons earlier than other girls because im in dance and on my period i always wear spandex with my leotard but my teacher keeps yelling at me not to but its only because i need to wear underwear! I don't know what to do!! I to scared to put in a tampon! Help!!!!!