Please help, braces and a loose tooth!?

Ok so mybRETARD sister elbowed me in the chin and i just got my braces this morning, and they were hurting before and now they are like on fire! And my bottom Janine tooth is like loose because i bit down so hard :( i know braces loosen the roots to move the teeth, so my tooth won't fall out right? Is this even due to the elbowing or is ot normal for them to be wiggly the first day. Thanks