Hi, i have been to my Gp with symptoms of - 20lbs weight loss , shaking, very thirsty, passing more urine and bowels than normal, and lower left back pain . He has taken bloods and sample of urine, urine shows high glaucose and blood, blood test is clear for diabetes and thyroid problems. Now sending me for a scan on my lower back? what could be wrong with me?. Thank You.