What should i do for my braces?

Applying wax WILL NOT bring down soreness or swelling. That you need Advil for. the wax is for if anything is like poking you, such as an exposed wire end. To apply the wax, you roll it into a ball and put it on whatever is sharp that is poking you, making it UN-sharp. Your teeth will remain sensitive for anywhere from 2 days to 2 weeks (data collected from asking my friends when I got mine on). The sensitivity didn't stop for me until after a week, but for most it's 4 days. As for the lisp, my cousins got it, but I never did, so I can't help you there. I do know that it does eventually go away for most people, but for some it kinda stays until you get your braces off (sorry!). I have an overbite but I have never gotten the mysterious stinging substance.