For sure, you need more expansion. Your upper teeth need to ;be expanded. Expansion will make more room for your teeth. Expansion will also look better as you develop a wider smile. Expansion will prevent cheek biting.
To keep your front teeth from flaring out too much and to prevent the...
The actual procedure of placing the attachments should not be any more discomfort than attaching something to your fingernails.
Then, after inserting your aligner there would be some soreness but not of a significant nature. You can preload with Aspirin or Tylenol immediately to make it more...
I understand that you feel like your teeth move fast, most people feel the same. Its not the movement that your orthodontist is concerned with. Its the stabilization of that movement before moving them more.
Ask him why he wants you to change aligners every three weeks rather...