I can totally sympathize with you! I know every woman is different, and I am not sure how soon after having your baby your period came back. My DS turned a year old May 28th, and I got my first period the middle of April - I too had a lot of nipple pain, and DS acted like he didn't want to nurse as much. That period was only 3 days (I was used to 7-day periods before!) I totally missed a May period, but just started another one yesterday. Once again, DS is acting like something is different and isn't nursing really well; plus nursing feels uncomfortable. While I haven't read extensively on the subject, I know enough to realize this is pretty normal . I think there is even a scientific word for erratic periods while nursing. Maybe you could try someof the tecniques you used in the beginning of nursing to help sooth nipple irritation - Lansinoh, Soothies, warm/cool cloths. Best of luck!