Hi, many thanks for the query!
For existing stones you need to get operated for removal of stones, Ureteroscopic removal would be good as the stone is in lower ureter (seen on X-ray KUB near ischial spine), operation is necessary as the stone is causing back pressure changes in the form of Hydronephrosis
& Hydroureter that will lead to compromise of kidney
function over period of time. You haven't mentioned the size of this lower ureteric stone but it must be larger as it is stuck there causing back pressure changes, so less likely to pass out with medicines.
You need to do- Sr. creatinine
to know the current kidney function, Sr. Uric acid so that treatment for that can be started, Urine (R & M), USG (KUB).
Take anti-spasmodics, pain killers, diuretics, urine alkalinizing agents, potassium-magnesium citrate
(if sr. uric acid is raised) with your doctor's opinion.
Drink plenty of water so that 3 litres of urine is voided in 24 hrs.
Wish you a good health.