I was diagnosed with precancer colon polyps and internal hemorrhoids and gastritis.still have blood in stool with burning in my abdomen should i worry?

Depends: Gastritis should improve with dietary modifications, acid blockers, and possible H pylori treatment; if not, further evaluation may be needed. Colon polyps should be followed with colonoscopy anywhere from 6 months to 5 years later, depending on type of polyp and confidence in that it was completely removed. Internal hems bleed and the source needs to be addressed - constipation, straining, etc