HI THANKS FOR POSTING YOUR QUERY. HAVING GONE THROUGH YOUR CONCERN,I WOULD LIKE TO TELL YOU THAT THESE SYMPTOMS OF YOURS ARE HIGHLY SUGGESTIVE OF RENAL CALCULI/KIDNEY STONES.YOUR PAST HISTORY IS SIGNIFICANT FOR KIDNEY STONES WHICH GIVES THE STRAIGHTFORWARD CLUE TO YOUR CURRENT ISSUE.KIDNEY STONES CAN GENERALLY ARISE AT DIFFERENT LEVELS -KIDNEY,URETER,BLADDER, BASED ON WHICH SYMPTOMS PRESENT. BACK PAIN RADIATING FROM BACK TO FRONT OF ABDOMEN IS QUITE SIGNIFICANT FOR STONE HIGH UP IN THE RENAL OUTLET OR PELVIS KNOWN AS staghorn calculus AS MOST LIKELY IN YOUR CASE. THIS KIND OF A STONE CAN PRESENT WITH BACKACHE,WITH LOIN TO GROIN RADIATION,DIFFICULTY IN PASSING URINE,PAIN WHILE URINATING,COMPLETE CESSATION OF URINE FLOW, OCCASIONALLY NAUSEA AND VOMITING. I WOULD LIKE TO ALERT NOW AS YOUR STONE DISORDER CAN BE PREDISPOSED TO A SPECIFIC URINARY TRACT INFECTION-CALLED ACUTE PYELONEPHRITIS .THIS CONDITION IS QUITE TOXIC TO PATIENT PRESENTING WITH CHILLS AND RIGORS.IT NEEDS INTENSIVE MANAGEMENT IN AN INTENSIVE CARSETTING WITH PARENTERAL HIGH DOSE ANTIBIOTICS.ALL YOU NEED TO CURRENTLY DO IS TO GET A PLAIN CT(COMPACT TOMOGRAPHY) SCAN OF YOUR ABDOMEN TO CORRECTLY IDENTIFY THE STONE MORPHOLOGY AND ITS LOCATION WHICH CAN GUIDE THE TREATMENT PROTOCOL.STONE BREAKING MEASURES INCLUDE ESWL-EXTRACORPOREAL SHOCK WAVE LITHOTRIPSY OR SURGERY- PCNL-PERCUTANEOUS NEPHROLITHOTOMY.PAIN KILLERS LIKE TRAMADOL CAN BE HELPFUL IN YOUR CASE. CONSULT AN EXPERT UROSURGEON TO DEAL WITH YOUR ISSUE. THANK YOU. TAKE CARE.