I got my period the 12-19 then had sex without condom; pulled out 3 days after my period ended &it's the 29 and i'm bleeding again &im on birthcontrol?

Breakthrough bleed: Breakthrough bleeding (bleeding at the wrong time) is very common on birth control. It happens in about 1/3 of users. Its no big deal and usually self corrects over time. If you are not satisfied or it continues to happen then consider using a different birth control method. It is a common side effect and does not mean something is wrong or that the pill is not working.