Im going through the same thing! Very nervous!! My DS is 7.5 months. I had my period when he was 3 months and then again when he was 6 months. However I have over the last week or so noticed that my nipples are EXTREMELY sore and sensitive and I am really worried that I might be pregnant again. I dont usually get it before a period, only when I was pregnant with my two boys. Im choosing to ignore it for the time being and hope that it will go away! ahaha! I am also fully breastfeeding, however he is eating a few meals a day and isnt BFing as much as a couple of months ago...who knows, maybe I am pregnant again!. ahhhhhhhhh!!