Did you bring proof you were sick and vomiting to the appt? Were you seen by another doctor?
I'm sorry you tested negative, but we as patients have a responsibility to keep our PM doctors in the loop, so if something occurs that prevents us from taking meds as prescribed, they are aware of it.
If you weren't taking the meds, you could have easily brought the pain meds with you, along with the antibiotic bottle to prove you still had the pain meds, and that you were ill requiring the antibiotics. That could have prevented the issue with zero meds in the test results.