Condom broke

So today I was having sex and the condom broke. Neither of us felt it so we don't know when it happened, but he always pulls out and I took Plan B, but I'm fertile today. I'm not entirely sure if he pulled out in time bc I felt a lot more wet afterwards then normal. He said he's pretty sure he did but I'm still worried. Am I just stressing too much, or should I actually be worried?