Pregnancy related query. Two concern!

My last period started on 7th June 2026 on the same day I started taking dronis 20, I took all the pills (24 pills) at same time hardly (30 to 1 hour delay from last pill could occur) and my took my last pill on 30th June 2026, and on 1st July my partner insert his finger deep inside my vagina juz after touching his penis, lubricant was coming from his penis juz after he touched his penis he started fingering, so I want to know about the possibility of pregnancy by this act and it's 4th July there is a 4 day gap after completed my last pill there is very light spotting occur, no proper period or withdrawal bleeding occurs so, I also want to know what could be the reason, I'm requesting you to please address my these two concern