Emergency Contraceptive & Ovulate

Danielle • 27 ♊️. Girl mom. Living life with Lluvia (9-17-18) & Xochitl (12-02-2021) Loading baby #3

Hi! I have a question- I took Plan B about 48hrs after unprotected sex on 4/10. My chart shows that the 10th was my highest chance of getting pregnant. On Sunday I took an ovulation test and it’s showed that I was. My question is- it is possible that I can become pregnant even though I took an EC and still seemed to ovulate?