What Causes Milky Breast Discharge And Headache?

HELLO... I HAVEN'T HAD A PERIOD IN 14 MONTHS, MILKY DISCHARGE FROM MY BREAST FOR AS LONG AS I CAN REMEMBER, MASSIVE HEADACHES THAT CAN SOMETIMES LAST UP TO 3 DAYS, VISION LOST, GAINED ABOUT 20LBS IN THE PAST 2 YEARS. ALSO EXPERIENCE NECK STIFFNESS AT TIMES AND MY LOWER BACK HURTS WHEN I SIT FOR OVER 30 MINUTES OR SO

......NEED ADVICE....PLEASE HELP!!!!!