I havent had a normal period for months. i am over weight 5"3 (299 pounds i have been having bloody stoles and discharge of dry blood clot and pain?

See a MD ASAP: The colon/rectal bleeding represented by the "black stools" is disconcerting and may indicate a more serious problem then missing periods. Your obesity is wrecking havoc with your pituitary's ability to function normally to produce regular periods by hormonally suppressing its' function. See a MD, (FP or OB GYN) as soon as possible.(ASAP).