Thank you all for your advice. I phoned the doctor's office and spoke with one of the nurses. She told me that the lab found Enterococcus in my urine sample. I asked the nurse about not having any symptoms and she stressed that since the bacteria was found that I had to take the medication.
So I just had my dinner and I started my week-long affair with M.acrobid.
[Can you hear the sarcasm?]