Stomach pain (kidney stone) Of urine.

I was having severe stomach pain, loose stool and constipation both so had consulted a Gastroenterologist, he suggested to do abdomen CT-Scan. The report findings are that there is a 10*8mm and 5mm stone in the lower pole calyx of right kidney and multiple stones in right kidney. *Diffuse mucosal enhancement thickening of right renal pelvis & proximal ureter with maximum thickness 4.2 mm with surrounding fat stranding.* I am having stone from last 2years where I came to know of it when I had issue in urination. The starting of urination takes time, which doctor told me that it's bladder shyness. Problem in starting urine is from my childhood, but now I also feel pain in urination and difficulty to urinate also, slow passing of urine.