I had sex 3 days ago unprotected. he came in me twice. how likely is it that i'm pregnant? & when should i take a test?

Ovulation: The easy answer is that you for sure could be pregnant, but how close the unprotected sex was to ovulation would give a stronger idea of the chance. Depends on when you ovulate/ovulated - since you probably don't know that for sure, when was your last period? You can/should take a test about 12 days after ovulation or roughly 1-2 days before you expect your next period.