Unprotected sex while switching pills

I was on Loestrin 24fe for 6 months , then switched to Yaz for 2 months , i didnt like it at all and so decided to switch back to Loestrin.

Within the first week of switching back i had unprotected sex with my partner , he pulled out before he came ..

1. What are my chances of getting pregnant from such actions ?

2. What are the chances of getting pregnant while on the pill if my partner ejaculates inside of me?

Thanks