Hello and thanks for help. I am a very healthy
Stool test recommended...
Since you continue to have diarrhea for more than a week, I would suggest to get a stool test done. This will help us identify any kind of bacterial infection - which seems less likely to me. The need for antibiotic is based on test results.
In the interim, I would suggest to use probiotics and not antibiotics straight away. Drink lots of fluids and remain hydrated.
Hope this helps. let me know if you need clarifications.