I'm randomly getting my period every two weeks on the active pills of levlen (ethinyl estradiol and levonorgestrel) ed and super bad period pain, what is causing this?

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.