I know how you feel. I had a colonoscopy done 4 years back and the doctor told me I had polyps and a tendency to get colorectal cancer. Now 4 years later (and after much abuse of laxatives) I have probably worsened my condition. Since yesterday I am getting a constant burning sensation from inside my rectum. I don't believe it is from hemmoroids (although I am praying it just is). Am going for an examination sometime this or next week if possible.
I too have immense difficulty in getting a bowel movement even after taking laxatives. I am just praying that my condition has not worsened to the extent which may require surgery.