Taking the ipill within 12 hours of unprotected sex is one of the most effective windows for emergency contraception, so your chances of pregnancy are low. Not having nausea or spotting doesn't tell you much either way this early, and the pill itself can shift your period by a few days in either direction.
Next Steps
Wait for your period for now. If it's more than a week late, take a home urine
pregnancy test, since that's the most reliable way to check at this stage.
Health Tips
See a gynaecologist if you get heavy bleeding, severe pain, or your period still hasn't come after 10 days.