Hi. I got my braces off about 1 and a half years ago and was soon given a retainer to wear. I was told to wear the retainer 24 hours a day right after my braces were removed, and after 6 months, was advised to only wear it at night. I, after 4 months of adhering to a nightly schedule of putting on my retainer, soon decided to stop wearing it. For the past 9 months I have stopped wearing my retainer, and now, one of my teeth is slightly jutting out. What should I do to fix this problem? Is this normal? Thank you.