My front right tooth has been VERY sensitive. If cold air blows on it when I'm walking or just drinking water. I've noticed in in the past 3 weeks and I am on tray 9 in my Invisalign (wear them for two weeks each tray) Could Invisalign be creating my teeth to die?! What is happening? I'm scared my tooth is going to die and I've just spent so much money trying to fix them