Rectal pain without bleeding

I am having this rectal pain for past three months. But I did not find any bleeding with my BM. Pain is kind of piercing one. I have had endoscopy 2 years back and everything was normal except for my acidity. Recently I was diagnosed with Kidney stone, but doctor said they did not find any stone, that it might have passed, but they found some scar. I always doubted that I have Hemorrhoids, since I used to get pain and burning sensation, when I have spicy food or when I am constipated. But at least in past 5 years there was no bleeding for sure. This pain I am having is kind of radiated to buttocks, hip and lower back. I am really worried with this whether I am having Piles or fissure or other serious health condition. I might be hypochondriac. 

Hi - Do you have any swelling post BM, if so you might have grade-1/2 Hemorrhoids.

You have been consulting the Drs who could ascertain the cause of the pain; hemorrhoids or some thing else. I feel hemorrhoids are creating problems. Hence do consult the concerned Dr. again.

Tomorrow I will be consulting the Doctor, I hope there wont be any serious health problems.

I have done a self examination, and I found a small red swelling inside the anus which is causing stinging pain. I feel the Sphincter is too tight. I will be Consulting the doctor tomorrow.