[Kumagoro]

It's unlikely, but because he fingered you there is still a chance. However, you said "later" - like the others have said, the sperm would have most likely died by that time. I don't think you need to talk the morning after pill, but as far as I know there is no harm in taking it if you want to be extra safe, just as there is no harm in taking a pregnancy test if your period doesn't come.