R.
Yeah. Mastitis is probably the culprit. Call your doc and get it delt with before you start to feel really awful! I got this with my oldest when I returned to work. At first it was just really painful,especially during let down of milk. The next day, I felt so bad I didn't want to get out of bed (fever, chills, body ache). I went the my OB/GYN and got a scrip for some antibiotics and knocked it out without a problem. I got it again with my youngest and knew what to do right away so it never got to the horrible stage. Good luck!