Bowel cancer is extremely unlikely in anyone under 50, but it could be UC - the family history makes it more likely. Do the blood and stool tests, and this time make sure you also have a colonoscopy.
Edit: Sorry, reading comprehension >_>. Do the stool test! It's easiest to go in a disposable cardboard/plastic bowl and scoop the sample out into the titchy tube they give you.
Post Edited (NiceCupOfTea) : 9/15/2015 1:58:01 PM (GMT-6)