How should i ask for pads and tampons?

so i got my period 2 months ago and my 3rd period is coming up. and my mom still hasnt bought me anything she gave me a box of always dri-liners and 3 pads when i got my first period. i used tthose t3 pads and i have to take pads from my moms bathroom now and im getting tired of it i need my own things. but i dont know wat to say im really shy and not close with my mom cuz she gets weird about tht stuff. how should i ask her?? what should i say?? maybe when i go to the store wat should i say when i get by the aisle?? plz help im rilly mad im so shy and cant gather enough courage to ask