After birth, your periods will return at your body’s own pace. It’s possible for your periods to return as soon as 4 to 6 weeks after childbirth. If you bottle feed or partially breastfeed your baby, you’ll tend to start having periods sooner than if you exclusively breastfeed. If you choose to breastfeed exclusively, your first period may not return for several months. For those who keep breastfeeding, it might not return for 1 to 2 years. There is no way to know if your periods will return the same way they were before you were pregnant. If you experience a different kind of period pain or your periods have changed, speak to your doctor if you have any concerns. Taking period pain medication containing naproxen is not recommended if you are breastfeeding.