I have had my teeth straightened with invisalign and now have vivera retainers. I wore them full time for 6 months and now wear every night. In the last couple of weeks I have noticed one of my bottom teeth moving significantly during the day; teeth are straight in the morning but one tooth moves so it is visibly in front of the others during the day, and becomes slightly uncomfortable, it corrects again over night. Should I go back to full time wearing whilst it settles down? For how long?