i looked and it says you have children. the discharge might be leakage from your previous pregnancy.
if your having unprotected sex then, yes you can be pregnant.....as for your symptoms, your having a sticky discharge comming out of your breasts which is way early for pregnancy symptoms, however that does sound like your having an hormonal issue going on.
if you think your pregnant, then your going ot have to take a pregnancy test. you can not go on symptoms alone