Period was march13-17 &had unprotected sex march20&26 now my bf jst got a vasectomy 3months ago &his doc never confirm he was sterile can i get prego?

Unlikely: Although unlikely with vasectomy there can be a failure rate. Home pregnancy test for you for piece of mind. Call your urologist or PCP to confirm sperm presence or absence.

Confirm with doctor: It may still be possible to get pregnant: semen analysis is recommended to confirm sterility. Some studies have shown 80% of men were sterile after 3 months, however, without confirmation, you cannot be certain. When a woman is most fertile varies from person to person, so it’s hard to predict your likelihood of pregnancy based on these dates alone.