3 months back i  got a sharp back pain ,Usg report mentioned 2 kidney stones of 6.5 mm in lower left ureter just proximal to vuj, and 4.9 mm stone in right kidney .After 2 months the usg reports showed that the right kidney stone passed and the left stone is still stuck and is 5.3 mm with mild hydroureter . The usg doc said the diff in size maybe due to measuring errors and stones don't dissolve . What should i do i  don't feel pain or any other kidney stone symptoms.The left kidney stone is located at lower left ureter just proximal to vuj. Currently i am taking ayurvedic meds for kidney stones.