I have a greenish colored discharge coming from my breasts. What is it? I have never noticed this before, and my breasts are a little sore.

Fibrocystic changes. Fibrocystic changes of the breast (used to be called fibrocystic disease - but when 40% of women have it, how can you call it a disease) are a hormonally dependent changes of the breast - soreness and sometimes cyst development which typically contain a greenish fluid. Also associated with this is the discharge that can be greenish. Would recommend however getting it checked out.