Hello and thanks for your question.
It's my first priority to help you.
I understand your concern.
As per your description,swallowing Chlorhexidine gluconate mouth rinse can sometimes result in nausea,stomach pain if taken more than 4 ounces.
So possibly ingesting one ounce wouldn't hurt you so much.
However you should continue to maintain a good hydration.
Eat a bland food,banana,yogurt.
Also take OTC Zantac.
And watch for any symptoms like vomiting,pain abdomen for next few hours.
Otherwise you'll be fine.
Feel free for further queries. It's good to discuss rather than quit.
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