EllaOne 5 days after an incident

Hi, this is the first time I’ve ever taken this pill.

So, the condome broke, he didn’t finish inside, he pulled out quite some time before finishing but I was so scared, but I took EllaOne 5 days after the incident.

Can anyone tell me will this work? I have no idea if i ovulated, however <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> tells me I was on my fertile days.

Also, I’m worried about side effects and how much it will mess my cycle up 😟