Late ???


Ok ladies I need help! I have never in my 13 years of having a period been late . Actually , I usually have it right on the day glow predicts or the day before BUT I am late . It is only by one day buuuutttttt it’s very unusual. My boyfriend and I have been wearing condoms , but sometimes don’t put them on till later in the sex and he did cum inside me after my ovulation. We have not been trying to get pregnant due to our recent miscarriage in November . Has this happened to anyone? Is it possible for me to be pregnant even tho he cummed in me after ovulation ( about a week and a half before period ) and after using protection ?