This is known as galactorrhea
and could be due to a number of causes. Did you notice any breast pain
, headache and visual problem recently? if yes check your serum prolactin
levels, and consult a gynaecologist. It may be because of a number of drugs or local breast pathology. So, better consult and get examined by a Dr at the earlist. It has nothing to do with your past breast feeding. Good luck.