When I had mine, almost every time the wires got put on/changed there was some sticking out, which wasn't much fun for my gums. I actually got sort of callouses on the inside of my cheeks where I'd been "stabbed" by the loose ends for so long, but in the short term, get some dental wax and put it over any sharp bits. Your teeth will feel painful and possibly wobbly for quite a while also, this is because of the brace pulling at them to get them where they should be. In my own experience, braces are no fun at all, but you'll know they were worth it when they come off.
