Condom slipped off while pulling out!?

My boyfriends and I had sex a little over a week ago. He came and and when we were done he pulled out kinda fast. Right after he pulled out he realized his condom was missing. I didn't move at all and the first the I did was look down and it was sticking out of me. Most of the condom was out, pretty much just the top part and some of the middle was still inside of me. I hurried and pulled in out and ran to the shower to wash of any possible sperm. I don't think any got inside me since the condom was as far out as it was. But could there still be a chance? Please help.