I am normally constipated with blood in my stool. But for last three weeks I've been having stool that look like grapes. They look like Type 1 but they are soft. And I have a bowl movement either everyday or every second day. They are extremely hard to pass.This isn't my usual constipation. Every time I go to the bathroom I have to strain so hard, so long. It makes me think there's a blockage in the way and I am unable to pass stool when it's ready. Can you give me some advice on this?