Pain in left side & abnormal bm for month- liver, lungs, blood, urine, endoscopy, kidneys, gall bladder, lungs, heart, all ok - possible colon cancer?

Worries colon cancer: first I need to know your age and family history of colon cancer and other cancers and your BMI and your eating habits and your smoking drinking daily activities Vitamin D levels history of colonoscopy weight loss your hemoglobin and iron levels;so many issues before I jump into the dilemma of colon cancer concerns for non-specific symptoms which has been for a month or so!!!