HELP ME PLEASee!?

I started my period on the fourth of july and got it 6 days early. thsi mont.. i know its normal but im without a mom and i NEED to tell my dad that i got my period...how do i tell him? im too scared and shy to tell him stuff like that ever since my mum.......... i wish i had my mum...i wouldnt be shy to tell her........ anyway.... i can write my mum letters in the mail but i cant talk to her on the phonee and im afraid if i send her a letter in the mail then her boyfriend or my aunt will read it and i will get so embarrased! dont ask why i cant tlak to her! anyway....how do i get pads or tell my dad that i need pads!?!? HELP