I woke up this morning and my right boob felt a little full. Then in the afternoon it felt like my baby had not nursed all morning and she had about 3 time. Now it is the size of a tennis ball hard and bumpy and it hurts when my lo latches on. She is 7 months i have tried warm water and i have been nursing her every 1 to 3 hours. It is starting to hurts...What is it and what do i do?