pain on my left side of my kidney

i've been having a back pain on my left side for the past six months. The pain is very severe especially in the morning. I went to my local doctor, he check to see if there was blood in my urine. And told me it ca't be my kidneys or kidney stone, cause there were no sign of blood in my urine. I've taken antibiotics but the pain in still there. Is there any reason to worry???...click here to continue

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