You should only develop a "square face"/jaw line if your masseter muscles hypertrophy due to excessive clinching and grinding onto the aligners or orthotics placed into the mouth. This happens frequently without orthodontics too and can be controlled or reversed with Botox. This can also be ag...
One to two weeks is pretty normal. Don't understand why it would take months. You best call and ask the dentist for a more detailed reason. If the teeth shift in the meantime you may need to do more Invisalign and then order new retainers.
Fortunately tears in the plastic are pretty easy to recognize if you look closely. I cannot tell from the photograph that you submitted. If an aligner tears, it cannot be worn because it moves the teeth in random direction and subsequent aligners will not fit. If the aligner does not seat over...
