Retainers not given for 1-2 weeks after an incomplete braces treatment. Is this normal?

ill be getting braces off on the 12th of July. But mt ortho said ill be getting my retainers after 4 days (earliest) or 1-2 weeks (lastest) around july 25th depending on how fast the lab makes them and sends them.They are saying that my teeth will MOVE and they're not giving me any other temporary retainers or the bonded retainers. I've had braces for 4 years and i feel like my teeth will definitely shift in 1-2 weeks. Should i talk to my ortho again? I hate my ortho what should i do:(

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