I understand your concerns.
Given the fever, GI symptoms, and elevated white el count, an recent exposure to the mice, there is risk of tularemia cause by the F tularensis a gram negative bacteria.
This can also be salmonellosis or salmonella infection.
Or this can be a UTI as well.
Good news, all these infections can be treated with same antibiotic like Ciprofloxacin.
Hence, I will suggest you to go back to the ER and get an antibiotic prescription.
Cipro dose should be 500 mg twice daily for 7 days.
It was my pleasure to help you today.
If I have answered all your questions, Please rate my response Excellent (click on the smiley faces) under this chat box only.
Please bookmark my profile for asking further questions!
This is the link to my profile: