i've undergo Invisalign treatment for nearly a year now and while I'm on my last retainer which I am suppose to wear for another year or so, I've noticed that my bottom teeth are not at the same height, Especially the right canine tooth. It's really bothering me. Can you give any suggestion on why this might have happened?, anything I could do to fix it? Or is it fine and I should just leave it and continue on with the treatment and see what might happen?