Final crown fitted for 3 x front teeth, at appoint, retainer impressions taken. My teeth look & feel like they shifted. Advice?

I had final crown fitted 2 weeks ago 3 x front crowns, at the final crown appointment impressions were taken for a retainer. My teeth feel and look like they have moved- I go in for a retainer in 3 days will my teeth fit back into place after wearing my retainer for a few days.