What does it mean if your boyfriend came in you a week ago and get period?

It is not possible to get your period from your boyfriend coming inside of you. A period is caused by the shedding of the lining of the uterus, which happens every month as a result of the hormonal cycle. If you have had unprotected sex, it is possible that you could be pregnant, which could cause a missed period. If you have any questions about your reproductive health, it is important to talk to your doctor.