When am I protected against pregnancy if I have used Slinda?

Good morning, due to very irregular menstruation and the inability to calculate when ovulation occurs, I decided on birth control pills to avoid unwanted pregnancy. I waited until the first day of the period of 82 days and on the first day more than blood I had brown spotting + the period appeared around 18-19, an hour according to did not suit me to take daily at this hour tablets, so I decided to take the next day at 10 o'clock chosen by me, then the correct bleeding occurred. The question is, did it get in the way? Am I already protected? The drug is Slinda and I have been taking it for 7 days now.