I didn't have those exact symptoms but did have a colonoscopy for bright red rectal bleeding, with weight loss, trapped wind and occasional loose stools. I was 40 too and the specialist said that at my age, I would have to be "the most unlucky person in the world" for it to turn out to be cancer, that that was a possibility with those symptoms but the least likely of all the options and that it was most likely hemorrohoids. Which was all they found when they did the colonoscopy.

I will add that this might not be the best place to find people who turned out to have hemorrhoids.Just that being a cancer site, people who had cancer are more likely to be on here than people who turned out to have hemorrhoids or even other possibilities such as IBD.