If me and my bf have sex and he ejaculates in me multiple times a day for a week can i get pregnant?

Most definitely: If you are not using any birth control and do not have any history of any infertility or other gyn conditions, you will most surely get pregnant.

Additionally: It also depends on what phase of your cycle you are in.. You have a higher likelihood of getting pregnant if you are having intercouse for a week roughly 2 weeks after your period.

Yes: What truly matters if a healthy sperm penetrates an egg. Do get info on getting pregnant.