I just went from an upper essix retainer to an upper hawley retainer (I am currently only in night time wear). I was used to the essix fitting really snug over my teeth. When I put the Hawley in it feels a bit loose, and there is a small gap at the roof of my mouth and the retainer. After wearing it fo a few hours, it sems to be a little more snug. I've never worn a hawley retainer before, so I'm not sure this is normal. How should the retainer fit, and how can I tell if it fits properly? The ortho told me it would feel strange, but is this feeling normal? I go back in two weeks for a check and adjustment if needed. Thanks.