If stone of 4.3 mm causing persistent storage symptoms like increased urinary frequency
Urgency
Nocturnal frequency
Recurrent uti
Then Cystoscopy will be helpful
Stone of size 4.3 mm usually passes naturally from the urethra
Looks like you are suffering from stricture
Next Steps
uroflowmetry test
plenty of fluids
c.urimax ,0.4 mg daily night
Health Tips
if symptoms persist then Cystoscopy is option