hi. im mick,i am 34, 177cm and weigh 99kg. i have a sharp pain in my lower right back...i went to doctor and had a blood test and my result for kidney was 112 a little higher than normal, he told me to drink water. it is still very sore. i cant poo, my urine is yellowy green and it smells stronger than usual, i also feel tired and have slight headache. what could be wrong with me. could it be cancerous. thanks