I got my invisalign brackets off a week early due to vacation and just wore my last tray an extra 2 weeks before my retainers came in. I wore them 22 hours a day as I'm supposed to do. Now that I got my retainers I noticed I have a small gap between my top 2 front teeth. I have still been wearing by retainers 22 hours a day. Is this normal or is my retainer off, I have an appointment later this week to see my dentist. But I wear them 22 hours a day like I'm supposed to do, just don't want a gap