What is happening to me !!!!

Ok so lately my body has been going thru some changes . I recently started throwing up the other day which raised a major concern for me because I never throw up then I been having lil cramps on and off and my lower back hurts . Also I lost my appetite for real food and all I ever want is sweets . last but not least I have 2 incidents where I peed on myself and didn't know until I felt it drizzling down my leg . can anybody tell me what I may be going thru ?