Hello! Thank you for the query. This jelly like substance is mucus. Every intestinal mucosa cell secretes such mucus so its present is quite normal. But the bowel movement with mucus only is not a normal thing. As well as blood in stool. Such symptoms can be caused by IBS,rectal polyp, inflammatory intestinal disease, hemorrhoids or even colon cancer (unlikely at your age). It is advisable for you to have colonoscopy performed. Full blood work, pancreas tests, urine analysis, stool tests and abdominal ultrasound should be also performed. Hope this will help. Regards.