Feeling very Anxious

Hi,  I have been reading everybody's comments on here lately, and have found it very helpful. So I thought I would post my own situation.  I am 34 year old female.Many months back I went to my gp with the complaint of extreme tiredness,  She done a blood test, which came back very low iron, so she put me on iron tablets to take daily. she felt this would solve the problem.  However 8 weeks later I went back for repeat blood test as advised, which came back no better than the 1st set of bloods taken.  Only then, my gp decided to do a full blood count, which came back with results of me being anemic. She referred me for an endoscopy and colonoscopy, as she said I am bleeding from somewhere.  The hospital decided to just do the endoscopy.  Results came back fine for that. She has now referred me for a colonoscopy again, so I am in the process of waiting to get my appointment date for that. My symptoms are slightly worrying as I obviously have unexplained anemia, blood on the toilet paper after emptying bowels, stomach pain (not constant) but regular enough. The tiredness for me is probably the most obvious symptom. I have 2 young children and really feel exhausted all of the time. Worried as everytime I research any of my symptoms it brings me to bowel cancer.   Wondering if anybody has had anything similar to my situation and what was the outcome?