I am a 57 year old man & I have always been regular whwn emptying my bowels, usually about 2-3 times a day. There have been a couple of times where I noticed blood in my poo buy they tended to be isolated incidents.

Anyway, 4 weeks ago I has a major bowel change. It started wirh a bout of constipation for 2 days and then what came out resembled medium sized black stones and the most amount of blood I have seen. It was more of a darker red and with mucus. 

Each day since then has been the same, black pebbles covered in bloody mucus. I have also lost 1 and a half stone in weight and have a severely decreased. I have always had a very big appetite. 

This has continued for the past 4 weeks and ihave just felt fatigued and unwell, during this time I have also noticed that when I urinate it doesn't look good, it looks like a dirty brown / red sometimes like coca cola.

So given all of the above I was referred by an A&E consultant for checks for Bowel Cancer under the 28 day rule.

Anyway, so I attended my Colonoscopy yesterday ans at thw end he said he couldn't see any abnormalities so I asked the logical question of qso what is causing me to offload a pile of black rocks every day covered in blood & mucus and where i have lost 1.5 stone not to mention that i feel heavily fatigued most days & ive lost my appetite.

I asked about the bleeding and he said it must be coming from higher up. I just feel confused., is this normal?