Bleeding from stomach. Threatning issue!

Hello respected doctors I am 24 yrs and my weight is 68 kgs i am taking following medicines Met xl and nexito(stopped a week ago) as i am suffering for High Bp met xl is for bp I am taking both this tabs since six months, I often notice there is bleeding in stool i.e in excess and this happens to me since maybe 8 months and there isn't any pain infact there is sometimes burning sensation, when it bleeds there is diarrhea and sometimes mucus is there and sometimes it seems food is not fully digested.this happens to me once or twice in a month and no pain while it happen i done ESR result is nineteen and biological reference interval <10 is my problem something with diet or someother threatning issue