im 21 I have a history of polycystic ovaries I have taken multiple at home pregnancy test they all come back negative here is my symptoms, Nauseous, craving, emotional, mood swings,the nipple area changing colors I have a white milky looking discharge from the vaginal area my breast are tender and itchy I have had stretch markson belly since I have 15 and they all of a sudden became itchy also what else could be going on with my body if im not pregnant?