I had Invisalign about 1 year ago. For the last year, I wear my Invisalign/retainer tray when I go to bed. When I wake up, my teeth are in perfect position. However, I feel as though they move throughout the day and by the time it's time for bed again, it feels/looks as though they've shifted a bit and the tray is really tight. I've been going through this process for about a year and I can't imagine the kind of damage I have done to my teeth. Do I need to see a Dentist and perhaps have to get Invisalign all over?