pregnant???

my boyfriend and i had sex around 8 pm last night and mid way he told me the condom broke and pulled out but he said that he hasn’t cum yet and so we just got a new one and continued. i’m on birth control but earlier this week i missed two pills so i had to double up. my pharmacist said no sex for 7 days bc i’m not protected but i did anyways. i bleed a really really tiny amount after wards and i was freaking out. we went and got plan b and i took it at 12 am and so i woke up with cramps and diarrhea. is this normal??? am i fine??