You need removal of the stone immediately. Also need evaluation of metabolic profile as to why so many stones have occurred at so early age.
Do complete blood profile, renal function test,
calcium,
uric acid,
albumin, urine routine
24 hour urine calcium,
Creatinine, uric acid, citrate, oxalate
Visit nephrologist with above reports for evaluation cause.
Visit urologist for immediate stone removal and stone analysis
Drink fluids.