it sounds like your lactating. This can happen when your hormones are out of balance, most like from the tumor on your pituitary gland. It can also happen as an unwanted side effect when using birth control pills and other pharmaceuticals.
Sounds like your prolactin levels may be high. Probably not to worry about, I assume you are being treated for your tumor, you may want to mention this to your endocrinologist though
hi i too have fluid coming from my boob..s..and i have had mammograms and all tests done..and hormone and bloods taken..yet still nothing shows up..so it is more common than u think..and it is ok..as long as it isnt discoloured or has a smell..its more than likely normal and another burden us women have...if i squeezed my nipple now(without being crude)i would have a milky fluid..have done for years now..and i too was worried when i first discovered..but there is no abnormal signs of anything wrong...just keep an eye on it and if there is change then check it out..