is it a good idea to take birth control during unprotected sex while im on birth control, ive been only on it for 17 days.
Most birth controls are effective after 7 days of use. If you are using it as directed then NO it is not a good idea to take an emergency contraceptive. They contain a very large dose of hormones, hormones you don't need.
Emergency contraceptives are for EMERGENCIES not for a backup.
Hope it helps.