Morning after pill the day after ovulation

Jayj • Current trying to make an amazing relationship work and trying to have our beautiful rainbow baby

So on Monday me and SO had sex and pulled out at the very last second. Well I took an ovulation test about an hr later and they were positive. We decided that we arnt ready to try for another baby since we recently lost a pregnancy about 2 months ago and I decided to take the morning after pill the next evening. Is there still a chance I could become pregnant? I'm not super informed on the morning after pill