For the past maybe 8 months I have been told to only wear my retainer at night. I am gone on a 3 week trip and forgot it.

I'm wondering when I get home when I put it back in will it fix my teeth back ? Also I assume there will be nothing I can do until I return home ? I have also had my braces off for around 1 maybe 2 years now are my teeth going to shift a lot ?

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