hello , i have pain on my left lower abdomen exactly almost where the left kidney is located , i made a ct scan and everything is well , i made also ultrasound and bone scan and everything is normal , but still i am with this pain all day , at night i have nothing but during the day all day with this pain , could you tell me something about this ? what i can say also is that i make about 3 hours sitting on bed with the laptop , is this a bad position ?