My daughter had "breast buds" for a few weeks after birth- due to my estrogen pediatrician said. They went away and haven't come back and I've been breastfeeding her all along. Yesterday I noticed a lump/swelling right at the nipple of her left breast (under skin, but moves easily). I'm worried and planning to take her to pedi next week....but was hoping for some insight from you all. I read online that my hormones in breastmilk could cause this and its nothing to worry about. Hoping that is true. Any ideas?