Ouch!

Note to self:  Never say out loud that the aligners are comfortable and hardly hurt.  Just put in set #3.  They are much tighter than the first 2 sets.  I could barely get them in, they hurt immediately, and I spent the last 10 minutes biting on a "chewie" (a small foam cylinder) to be sure the aligners are seated properly.  Here's hoping that the overnight trick works its magic.