Pain and discomfort in lower abdomen.

Feeling pain and discomfort in lower abdomen and kidney area for last six months. USG done and it's results tells that small stone in kidney and increase in size of prostate gland . In day time it's only a heavy feeling in back side but in sleeping time it feels like my bladder is full but urine comes very less and feels still some urine is there. More over i have to go to urinate for 2-3 times in night . It's daily disturbing my sleep. Morning time I feel one more extra pain in the middle portion of bladder and kidney, I guess from ureter. Don't know how to approach doctor and which specialisation. Some unnatural symptoms I have noticed in my body that if I sit quietly for some time I don't feel either my legs or hands and nervous sizzling is there, when I start shaking them again they come to life and my face swells a bit after getting up from bed,body feels tired. Suggestions please. Thanks in advance.