Was the effect of birth control pills already full on December 3?

Good morning on November 12/13 I took an antibiotic because I had strep throat (I only took it for 2 days). I also take jeanine contraceptive pills, I take them according to the leaflet I did not miss any and always at about the same time (sometimes it will happen an hour sooner or later). The last time I had intercourse was on December 3. Did the pills work 100% then? Was their performance still reduced? Today is the 2nd day of my 7 day break and bleeding from withdrawal no...