I'm 13 years old and whenever I am on my period on the first day its light and for the rest of the time its very heavy. I use pads whenever I am on my period but the blood always ends up going through it and I am scared to use a tampon. I change the pad about every 3 hours since it's always so heavy. I want to use a tampon but I don't know how to talk to my mom about it. What should I do?