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Ideally, I would go to a vet and get some x-rays. If you can go now, then I would do it now. If there is an obstruction, the sooner they go in surgically the better off she'll be. If you can't go in until tomorrow morning, then I would give a small amount of water tonight. You can give a small amount (1/4 cup) every 2-4 hours. The constant nausea does worry me, though, and I would do x-rays tonight if she were my dog.
I hope this helps, let me know if you have any other questions.