How can I get birth control?

so i'm 14 , i'm not ually active right now . but i want to get the pill for 3 main reasons , i have horribly irregular periods , bad acne & i don't want to be caught up in the moment unprepared & just have to stop . i've researched the pill because i heard word of mouth it helps those things , and i verified that certain pills do . so i guess my main questions are how can i get it ? where can i get it ? will i be for surely old enough ? and how can i hide it from my mom ? i know , my reasons shouldn't be anything to hide from my mom , but she doesn't trust me no matter what she says or what i say . i want to wait awhile before i have , i just want to have a period ONCE a month instead of twice , my mom would think i'm only lying . she'd find out eventually probably , but i'll cross that bridge when i get there . . any ideas ? thank you so muchhh !