I am 21. I've had non-watery diarrhoea a seemingly random number of times a day (anything from 1-15) for about six months. No pain. Feeling constantly bloated, full, always tired (though the latter preceded the diarrhoea). I've had a colonoscopy with biopsies (negative), full blood count, bacteriology, celiac tests, stool tests, abdominal/pelvic ultrasounds (and a chest x-ray thrown in for luck) all negative. I am terrified I have carcinoid. Absolutely terrified. If I have it's presumably too small to pick up by sonography or x ray and if I have diarrhoea it presumably means it's spread. Knowing that the probable lifespan for carcinoid can be 10ish years is terrifying when that only means I would be in my early 30s when I died if I did have it. I can't even bring myself to mention this as a concern to my doctor because I know full well I self-diagnose too much and she's been mad at me about it before (I don't want to be written off by my doctors entirely). I started taking calcium carbonate + vitamin D a couple of days ago and it seems to be having some positive effect but I am still incredibly scared I have carcinoid. Would it have had an effect if I did? I don't know, and can't find any literature to suggest it's even been tried. Is it even possible to have diarrhoea this constantly and for nothing but IBS to be wrong with you? Sorry for the big pile of worry. For obvious reasons I can't really talk to most people about this.