Then what are you concerned about? Did you cum inside her?
Ovulation feels differently for different women, usually a twinge though. How long it lasts also varies. Not very specific, I know, but there isn't a definitive answer.
When is her period due? Have her take a home pregnancy test as soon as it is late. Even the cheap walmart brand is fine to use.
Next time if there is a concern, or a condom breaks, you might want to look into the morning after pill. Check planned parenthood.