contraceptives

i was asked by my ob which contraceptive will i use and i chose pills. she gave me prescription for progestin only pills, which are okay while breastfeeding daw. but, apparently my mom told me not to use pills because of side effects, ganun din si partner. ayoko naman masundan si baby who's turning 1 month next week. ayokong months lang pagitan buntis na naman ako, coz my partner and i are doing withdrawal and calendar method, 'tong si baby nabuo kasi fertile ako nun but he came inside me even if i told him not to. with our relationship, I know that he's not into condoms, coz di nga raw feel. pa rant lang, i would talk to him about this po :) sabi ko naman sa kaniya 3 months bago magsex uli kasi yung tahi ko. should i go for pills without telling them?