I Have Multiple Stones In Right Kidney Of 3-4 Mm

I have multiple stones in right kidney of 3-4 mm and in left kidney there is ureterocele in which as per doctor the stone of 9 mm exists, what should I do, please guide me, also explain cause of this ureterocele, I M 24 years female, there is repeated tendency of forming stones in my kidney since last 3 years.