Could i be pregnant if my boyfriend got off in me right after my period?

Sure: The ovulation could happen as early as day 5-7, the sperm can live inside up to 72 hours and egg can live up to 24 hours, so it is very possible.

Pregnancy: If you are healthy and have sex without optimal protection you are always at risk of becoming pregnant. The rhythm method - having sex during off peak ovulation points as a means of birth control has resulted in many many babies. Why wonder? Do a pregnancy test. They are very sensitive and turn positive extremely early in pregnancy but not reliably until 2-3 weeks after sex.Otherwise use condoms

Maybe: It depends on a few factors such has how long your period lasted and when you ovulate but its possible. Sperm hang around for a few days waiting for ovulation. If you don't want to get pregnant, you might want consider using Plan B. It delays ovulation and prevents pregnancy when you make a mistake. Best to get on a birth control method to avoid an unplanned pregnancy. Best wishes!