Hi,
Thanks for posting your question here, I will try to answer it as best I can.
It was smart thinking to use an emergency pill, but it only works if it is taken with 24 hours of intercourse, so I cant say it will be effective or not.
The chances of you getting pregnant are there depending on what stage of your cycle you are on, if you are ovulating then yes there is a very big chance of conception.
So check when your last period was, add 14 days to that, the 4 days after that are the ones when you ovulate. As such these are the danger days when you can get pregnant, based on this you should be able to asses whether there is a chance of you getting pregnant or not.
On a side note you can take a home
pregnancy test in around a week.
If you arent pregnant, be careful in the future, try not to miss the pill. It can really come back to give you problems.
I hope this answered your question.