I want to use a cup but I'm scared

Ashlyn
I'm 15 and I'm sick and tired of ruining underwear because of sucky pads. I hear that a Dixie/diva/moon cup works wonders but I'm scared to put anything that big up there. I mean I've never even used tampons and I feel like that area is so fragile it could rip easily. I'm too scared to ask my mom to buy one, I mean I can barely even ask her for pads now (I'm running very low.) Any suggestions?