Contact a dentist for a consultation. It doesnt seem like you would need braces if you only have one tooth that is crooked. There are other cosmetic ways of fixing a crooked tooth. A dentist can look at your tooth (and possibly take x rays) and tell you the best treatment to fix your tooth.
Yes, I agree call your dentist and explain what is going on. You might get out of having to wear full ortho in some cases they will make a retainer for you to wear. If the tooth is not interfearing with any other tooth. Your dentist knows your case history so I would talk too him/her.
Good luck and God bless