Just tell your mom you need to talk to her, sit down with her and just tell her. I started my period and I need some pads. It's really nothing to be embarrassed about, trust me, your mom understands, it's not gross or unhealthy, just a fact of life that every woman goes through. Just tell her, she'll be happy to help you and be very understanding, you'll see!
How do you tell your mom to buy pads because you started your period. My mom hit menopause so I can't just take hers.
Just tell her.
Don't be worried.
She has her period too.
The worst and most embarassing thing she can do if you tell her is tell you congratulations.
If you don't tell her, the messy sheets will speak for you. :(