Sounds exactly like me, that's weird that you have periods once a year mind, I hope that is getting sorted also. I don't have them so I'm lucky being a bloke, but everything else I have, the stomach cramps and the number 2s are all the same. It is really painfull and worrying. Can't believe the sigmoidoscopy show everything is fine, hopefully they rush this colonoscopy for the both of us, I recommend sedation as the sigmoidoscopy is Just under half way, being a bloke thought I was hard hehehe it bloody hurt bad so take sedation, I am next time. I really think they are pollyps which are like skin tags which bleed when passing, it's like a build up of blood that's why the first one is sort of normal followed by blood. But these polyps do turn into cancer or can turn so it's best to sort it asap. That's all the research I came up with, as it's not piles or anything else. Don't think it's chrones disease. Just eat loads I recon then you got some to loose of it's serious. Hope everything work out for you and me. I will message on here with the end result.