D.J.
My period did not return until 11 months after delivery. However, I know you can get pregnant even if your period has not returned. I had a friend who got pregnant when her son was just two months old, who she was nursing exclusively. She did not even know until she felt the new baby kick! She just thought she was having a hard time losing her baby weight and not getting a period because she was nursing. What a surprise! Anyway, nursing while you are pregnant with another one is no big deal, but I know your production can drop once you hit the second trimester. Good luck.