I Had An Endoscopy 6 Days Ago. This Is My

I had an endoscopy 6 days ago. This is my third over the past year after they diagnosed MALT Lymphoma. They took more biopsies this time. I have had upset stomach after eating since the procedure and today I had two dark stools and feeling bloated. Had some bright red blood but only a small amount. I am an RN and don’t like to rush to being worried when it could be something I should just watch. Wondering if this Is normal? I didn’t have these symptoms last year.