Burning sensation in the urine may be due to Urinary tract infection
,Stone in the bladder/ureter/kidney
Though the Culture is negative,you have to think in terms of infection sometimes.
It has no relation to Acidity problem
Pantaprazole has no action on the Urinary tract.
abdomen has to be done regularly.Today it may be normal,few days later there may be a stone as chances of Recurrent stone formation is common
Please take plenty of fluids.
Please consult your Urologist
and get thoroughly checked.
Wish you speedy recovery.