will postinor work?

My husband came back from UK after 6 months of work there. So naturally we had a welcome back sex marathon the whole day 😂🙈, We did it 3 times with condom and later 3 times without and he ejaculated in me.
 I was just wondering if I could get pregnant from the last 3 ejaculations. I did take a postinor 2 after 9 hours of the first ejaculation. I was on the 24th day of my cycle. 
Do you think pregnancy is possible? 
Tbh, I'm just not ready for a baby yet after my miscarriage last year.Â