you may have both but unfortunately the information in your posting is not sufficient for me or any medical professional to be able to make a blind diagnosis. you will need to be examined by your ob-gyn or primary care medical provider.
i'm nursing my 9. 5 month old. both of my nipples are sore and one breast has hard lumps. mastitis or thrush? . the breast with the lumps is quite sore and the nipple has bled when nursing. i also have a low grade fever (was 100. 6 now 99. 5) chills and nausea. this has been going on for 48 hours. i have not slowed down with nursing but the lumps don't seem to be getting better.