If you just found out you're pregnant and start taking birth control pills now will you have a miscarriage or will it be an abortion?

Birth control will not cause a miscarriage or an abortion.

Continuing birth control while pregnant may or may not put a baby at risk of birth defects. Though there is little evidence showing that it may cause birth defects, you should still discontinue the use of birth control while pregnant.

Birth control pills work by convincing the woman's body (through hormonal changes) that it is pregnant so that she does not ovulate and therefore cannot conceive. Emergency contraception works in the same way but is a stronger dose that can be taken up to 5 days after sex.