I gave birth 10 days ago and I've noticed a lump fairy small under my left armpit, I've been to the gp and they just scared the crap out of me basically and told me to come back in a week to see if it had reduced or gone. They also said that if it was cancer a week woudnt make a difference! I'm 23 and hoping the likely hood of it been cancer is slim!! I've had an infection also and just hoping it's something related to that! Have any other mams experienced this after childbirth?? I'm also not breast feeding and my milk came in about a week ago