Braces Shifting After 2 Days? (photo)

Hi! I got my braces taken off just two days ago and they've moved significantly. I had a bad open bite and my ortho told me without surgery (wore vertical elastics instead) there is a high chance they'll move back and to wear my retainer 24/7. Only problem is, my appointment isn't for another week. Im curious to know if my teeth will go BACK to how they originally were once I took my braces off. Will they correct the shifting that has happened dramatically or just prevent it from getting worse?

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