nervousmum could it be MASTITIS
copied this from internet
Mastitis means that the breast is inflamed, and there is swelling, redness, tenderness and pain. There may be an infection, so it is wise to consult your health-care provider to determine whether or not an antibiotic is necessary. A breast infection can become a breast abscess that requires surgical draining, but this can almost always be prevented by treating mastitis promptly.
Signs of mastitis include:
Part or all of the breast is intensely painful, hot, tender, red, and swollen. Some mothers can pinpoint a definite area of inflammation, while at other times the entire breast is tender.
You feel tired, run down, achy, have chills or think you have the flu. A breastfeeding mother who thinks she has the flu probably has mastitis. Mothers with mastitis will sometimes experience these flu-like symptoms, even before they get a fever or notice breast tenderness.
You have chills or feel feverish, or your temperature is 101F or higher. These symptoms suggest that you have an infection.
You are feeling progressively worse, your breasts are growing more tender, and your fever is becoming more pronounced. With simple engorgement, a plugged duct, or mastitis without infection, you gradually feel better instead of worse.
Recent events have set you up for mastitis: cracked or bleeding nipples, stress or getting run down, missed feedings or longer intervals between feedings.