Hi,
You have signs of recurrent proctocolitis and the consultant has confirmed proctitis after examination.
One of the causes for these symptom is IBD ( CD & UC).
It can be confirmed with colonoscopy.
I have been struggling with UC for over 10 years. My condition is considered mild and like you, I have procitics which affects my lower left rectum. When I flare, its a lot more severe then what you describe. I get horrible diarrhea and lots of blood in the toilet. I looks like I am heavily menstruating. I have to use the toilet at least 3 times an hour. When I am not flaring, I sound like what you described as your signs. I actually get horrible constipation and see traces of blood in my bowel. The emergency room typically tells me its anal fissures. (Emergency room cause of pain, feels like passing glass) If you do have UC, its very mild, and it does not sound like Crohns to me.You might just have a sensitive digestive system. I am interested to here your results, I hope you post the conclusion.