How can I control bad breath in the hospital before I can eat or drink anything?

I'll be on a Nothing by Mouth order for the first two days after my surgery (until the leak test). I'm wondering...how will I control bad breath odor? Can I brush my teeth or rinse with mouthwash if I spit it out? How about breath spray (sugarless). I'm always so conscious of any embarrassing body odors, I'm worried that my breath will be horrible and that would be mortifying in communicating with hospital staff or my guests.

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