HELP!!! THE PILL!!

ok so i’m 14 and my period is due the day i go home from my holiday with is the 17th aug. my mum said i can go get the pill to stop it from coming if it does come BUT i’m way too scared to go talk to a doctor about anything and so to talk about periods is a big no no for me. i really need a way to not go the doctors to get the pill because i’ll happily take it, i just don’t want to go to the doctors if that makes sense. does anyone know any way to delay a period so it comes like 2 days after it’s due. ps my periods are normally late but i’m not too sure on this one PLEASE REPLY!