You say protected sex, but also that you aren't sure if a condom was used.
Since you only took the antibiotics that morning, it probably won't affect your test that afternoon. However, it was on the early side to test.
Azithromycin will only cure chlamydia, not gonorrhea, which you are at risk for from unprotected oral sex. Since you took the antibiotic, you should wait 2-3 weeks to test again, unless you get symptoms. If you get symptoms, go right in for testing.
Chances aren't high that you got gonorrhea - it's less common than chlamydia, and definitely less common orally. I'd probably not re-test, especially if a condom was used for the vaginal sex, but it's up to you.
1) you should have waited for a week before testing for cure
2) actually no need, test of cure for chlamydia is unnecessary. Unlikely that there will be resistant