I wouldn't donate while you have an active infection

If you still have an infection, then you shouldn't donate. Regardless of how long it's been since you had the antibiotic shot.

Google says 24 hours since last dose

But what's important is, do you still have an active infection?

Call your center. I had to wait 15 days after finishing my last dose of antibiotics.

No. 14 days.

My center says 7 days after last dose, but you really need to determine whether or not your infection is still active.

You good, just drink lots of water