Blood with bowel movement and gray colour

So I have had really regular and smelly farts since having my first baby, I have regular bowel movements usually come out nice and easy, sometimes a little large. I've noticed blood more and more in my stool and never feel like I'm finished my poo. I've noticed the colour is yellow and often have the problem of having to wipe half an hr after my poo, there's always residue. I have stomach pain sometimes. Is there anyway to check rectum health without getting a colonoscopy. I'm confused as to why I keep bleeding but have regular poos that come out easy. I rarely have diarrhoea either. Blood is inside the poo and present when I wipe.