gluten, dairy, sinuses, sinusitis, antibiotics

No. Especially fluoroquinolones. Thinking better, none would be safe.

Sinuses will be healed from the acute episode, through WF, in about 5-10 days, at most, depending on the severity. Oregano essence or menthol can help breathing. Some Neti/Nasal irrigation - but not overdoing either can help too. You don't want to be in a cold environment with residual water in your sinuses. mucus discharge is to be expected further if multiple sinusitis episodes.

Avoid grains(esp. gluten-gliadin)/dairy afterwards until you found your triggers, ... eventually avoid forever. :)

DL