Hi, I'm an 18 year old male who admittedly suffers from anxiety (especially medical anxiety). I have recently been consumed by the constant worry that I may have colon cancer. What began this fear was the fact that when I had a bm I would notice a red chunk in my stool also I would notice a darker chunk in my stool (the red and black was not streaky). I went to the doctour and he was not concerned he sent me to get my hemoglobin tested which returned to be normal. I recently began taking metamucil to soften my stool, I have recently noticed green muddier poops. I have changed my diet from a high fat diet which I previously had. I am 6'3 about 185-190 pounds. My brother has crohns disease, other than weird bm's I feel completely fine. I have noticed about a 2-3 pound drop in weight but that may be because my new lifestyle of working out and trying to eat healthier. Should I be concerned? Also, sometimes I notice blood on the toilet paper but I believe that is because I wipe to hard and it is not a lot and it stings near the anus whole.
Please, I need some opinions.