I want to shop alone for ladies hygiene products, but im a tween and embarrassed?

I need to buy more deodorant and lotion and pads and stuff, but i cant go with my mom, and im too embarrassed to go with my dad. In 12, almost 13, and i really just want to get the stuff and get out of there b4 my father can make fun of me. How can i shop alone??!?!!