I Had Unprotected Sex For 3times In A10days.And I Took

I had unprotected sex for 3times in a10days.And I took birth control pills everytime within 72 hours.after 8days I had heavy bleeding for a day and after that it stopped.I thought it was periods but it was just for a day.after that I missed my periods date. After 10 days of my normal period date I had 2days heavy bleeding.Am I pregnant...???