Is it possible for someone to get pregnant if they have sex while being on period? (on bcp)

Patient: My wife is and has been on Loette birth control pill for almost a year. she had her on time period so she had to stop taking the pills for 7 days. on the 7th day of her period she stopped bleeding in the morning and then we had unprotected sex which I ejaculated inside her at 10 pm. the next day she started taking her birth control pill as usual in the morning. are we safe?i am scared that sperms have already reached the eggs:(i would so appreciate any help.