What should i do?

I don’t know how i can get more tampons and pads. i’m 16 and i only started getting my period around the middle of the school year. i’ve only gone shopping for supplies once and it was with a friend that i don’t talk to anymore. my mom died when i was a kid and there are no other girls in my family. i can’t ask my dad because he won’t even talk about bras (i didn’t get my first bra until i was in 7th grade. and i went with my friend). i have a couple aunts but i’m not super close to them and they would just talk about it to other family members, and i really don’t need that rn. my period is still fairly irregular so i don’t always know when it’s gonna happen but i’m getting close and i’ve been noticing mood swings recently. i think it’s gonna start soon and i don’t have any tampons and i’m gonna be swimming a lot now that it’s summer. i just don’t know what to do. can someone please help me.