Hi Pamela,
You are doing the right thing by having this bleeding checked out thoroughly. I also had some bowel problems which required a colonoscopy to eliminate the possibility of any more cancer. I was fine, and also think stress was my major cause. I have had 2 family members who have been passing blood, one had colitis, and the other diverticulitis, neither of which were diagnosed until the colonoscopy, so hopefully your husbands results will rule out your fears also.
Hoping all the best
Flamenco.