I am 19 years old, since I was really young I've always had problems with my digestive system. There are times that I go 4-5 days without going to the bathroom. I am always constipated, and when I eat my stomach becomes really bloated to the point that I look pregnant. I've always had this problem, sometimes when I do go to the bathroom I bleed a lot, and sometimes very little. Also when I eat the upper part of my stomach begins to hurt. I am very concerned, I have been to many doctors already and all of them say it is nothing serious, it is just my diet. But I eat very healthy. Can you please explain to me what this might be? I do not know if I should consider colon cancer. Thank you