Condom fell off inside me?!

Okay so me and my husband had sex tonight and after he ejaculated he started to pull out and the condom fell off inside of me with all of the sperm! It definitely came out because it got on the bed and down there and there wasn't very much sperm left in the condom once I pulled it out. This has NEVER happened before and have used the same condoms for a long time. Im pretty sure I am ovulating too because of my CM appearance and consistency! Chances of falling pregnant from this??