This happened to my daughter a few weeks ago. She went 5 days. I did eventually give her the suppository because 3 days of miralax wasn't doing anything. Once she went, the mirslax made her lose some control which has never happened before. Since then, if she doesn't go 1 days, I start the Miralax. FYI with the suppository, you only need to get a very small amount in for it to work.