I had an abortion and planned parenthood gave me birth control pills, lutera, to prevent ovulation 2 weeks after the abortion and to be safe.

Lutera and planned parenthood says that it takes 7 days to be effective. But I don't know...

I've been consistent with taking the pill no more than 30 minutes late. I took my first pill the day after the abortion like they told me to. I didn't bleed until a day after taking the pill. The bleeding is very very minimal but continued for 2 weeks. On and off. When I was finally for sure certain the bleeding was over, I had unprotected sex and he did not cum inside of me on the 20th and 21st day of my pill packet. I will soon start the placebo pills. Should I worry about the possibility of being pregnant again? What are the chances?