I had severe constipation for about 2 months as well as rectal bleeding, and severe nausea and abdominal cramps. I had a series of investigations done, such as a colonoscopy (which was failed as they could not get round my bowel) as well as a CT scan and a MRI of my pelvis. They couldn’t see anything in the scans so the gastroenterologist labelled it as endometriosis and referred me to a gynaecologist. I am losing weight, I have lost my appetite and the nausea and abdominal pains are persistent. I’m so confused as it feels like there is something really serious wrong with me but nothing showed up on the Scans? Does anyone have any opinions as to what it could be?