Your problems basic route is with IBS .It is group of symptoms related to digestive and nervous system  . Your cystitis is secondary symptom.

Renal calculi 4 mm is present in left calyx. Tendency of body of formation of renal stone is root cause of your problem. Indigestion dryness in body intestines leads to residual urine formation cystitis pain infection. Antibiotic decrease in appetite less food intake indigestion problem weight loss problem. Correct your diet lifestyle first. Take nimbu in between food. Take santra and mousambi also in diet grapes also. Then you will see changes quickly. For more information take online consultation directly providing all the details through private chat. Correct your diet and lifestyle by pinpointly way

U take cooked vegetables,buttermilk,tendercoconut water,Barley water/ kanji Avoid spicy oily foods U take bangshil tab one thrice a day .stomach pain will subside.Chandraprabhavati one three times a day will also help you.