I'm 14 now. When I push them with my lower incicors and hold my fingers against them, I can feel them both move. Is this normal? Are they going to fall out?

u may grind or push against them when u sleep. do u have anxiety and stress during the day? because i found out the hard way u can take this stress out on ur teeth at night. if so try a night gaurd from wal greens , it will help.

Hey, cool, thanks man. Where can I get one of these? Is there an online store that will sell them?

yeah just check on the internet and search night guard and it shd come up. good luck with that

It depends. How much are they moving? It's perfectly normal for teeth to move a little when they're pushed against.