What if you had blood in your stool for a couple days and you just stop having a bowl movement like 3 days of no bowl movement?

Maybe problem or no. If unusual pattern for you, call doc. Blood "in" stool is different than blood "on" stool, or on toilet paper or in bowl. See your doc; may be from hemorrhoids and constipation, or a bigger deal.
See your doctor. Blood with bowel movements should always be evaluated by a doctor. So should acute changes in bowel habits. Don't delay.