Are you saying you've been on a regular daily birth control pill and you stopped taking it 3 days ago? No, it's not possible you will get pregnant in the first 3 days after stopping a daily birth control pill.
You will probably want to take some time to research how pregnancy occurs, and issues with pregnancy, childbirth and mothering if you are trying to get pregnant.
Otherwise, you will want to find a reliable form of birth control, because you will be fertile in the next month or so and could get pregnant if you have unprotected sex.
and by the way on that 2 days he ejaculated inside.