Of course taking the pill on time can give you a chance of getting pregnant, but it is doubtful unless you were ovulating. No matter what your boyfriend says, he knew having sex was a risk of getting pg, so if he is upset, he should have used condom.
well the whole 'how do i tell him' thing , just tell him, he will trust you im sure.
i did the same, i dont know if im pregnant yet but i dont think i am. remember theirs only ever an 8% chance of getting pregnant when you have NO contraception menthods at all , no pills or condoms or anything.