The first thing I would do is call my doctor's office and speak to his nurse.
Mention the bleeding and Sept. colonoscopy w/polyp.
The second thing I would do is:
1) Start exercising even if you start slow
2) Watch my diet. Add lots of fruits and vegetables and whole grains.
3) Drink ALOT of water. You can't gain weight but it can hydrate even your intestines.
All of this second group can help with simple constipation.
Mostly I wouldn't mess with bleeding. Your doctor's office needs to know about it so don't hesitate to let them know.