Pain in left side of abdomen radiating down to testicle can be due to a
kidney stone which has passed down to the ureter, a tube which carries urine from kidney to bladder.
Please get following tests done ...
1) Urine routine and culture
2) X-ray KUB region
3) Ultrasound of kidneys, ureter and bladder
Meanwhile you can take
Tab Meftal Spas once or twice a day
For pain.