You may want to switch antibiotics. Did the swelling begin the day after or did it take a few days for it to swell? Usually the swelling immediately after an extraction is due to trauma but it can take several days for an infection to start and spread. So if its spreading and swelling later on, then the antibiotics aren't doing their job. If its swelling ...
The side of your head or your teeth? Sorry. I don't really deal with head symmetry.
If it doesn't completely come out, there may be food trapped in the area underneath the gum where the top of the wisdom tooth is. Try to rinse the area out and brush back there. It may bleed and be sensitive while you do it. You should get the tooth out as this will be a recurring problem. I'm guessing you have what's called pericornitis.
Unusual. Sounds like it may be an abscess. Was the cavity deep?
Usually we prefer to fill all the canals due to potential problems with the canals. On the universal tooth counting system, number 26 is a lower incisor, which normally would only have 1-2 canals.
The dentist probably made a referral for a good reason. I would go to the endodontist and get it taken care of for peace of mind
It probably wouldn't affect her adult teeth but I would take her to a pediatric dentist (specialist) to get the teeth checked out. Although I don't think this is the case, a notched tooth could be indicative of congenital syphillis although I'm assuming she's very young and highly unlikely but its good to get it checked. But usually all the teeth are notche...
Yes, most likely its a clot. Don't disturb it. It should heal on its own
Its hard to say. You should ask your dentist. I would imagine the dentures will be very similar but you'd need to ask your dentist to be sure
Amoxicillin could help although it won't solve the problem. You should probably get it checked out to see whats going on. If it is a dental abscess, the antibiotics will help shrink the swelling down.
You may want a second opinion.
I never heard of doing braces on third molars (wisdom teeth). You may be able to keep them if they're straight or you're able to keep them clean.