I would suggest you get investigations like urine routine and microscopy , Ultrasound
abdomen to visualise the kidneys , ureters and bladder. This should help in finding out if you do have renal stones
. Make sure you drink plenty of water daily.
For your acidity problem , i would suggest you take Omeprazole
20 mg one tablet daily half an hour before breakfast for 1 week.
Hope this helps.
Dr. Divya Kuttikrishnan