i am a breastfeeding mother. I had unprotected sex today which contraceptive i is good for me which doesn't effect my baby

A. Progestin-only oral contraceptives, or “The Mini-Pill,” contain only a progestin (a female hormone). The method, when used daily, is highly effective for breastfeeding women. This method of contraception has a slightly higher failure rate than oral contraceptives (OCs) containing both estrogen and progestin.