Ttc on the day of stopping my pill at the end of its pack. Got my breakthrough bleed/AF the next day. Any chance of pregnancy?

Hi all, curious whether any of you have dtd the day you've stopped your pill (after finishing your pack) and become pregnant from it?

I had a breakthrough bleed the next day but it lasted 5 days and was heavy enough it may as well have been a mediocre AF. So I'm thinking that there would have been zero chance of pregnancy... I have heard of people getting pregnant straight off the pill.