I don't have a title, please read the post

Hello, I am 30F, married to my husband for last 3 years. He is 34M. A few months back, we were in a full fledged fight. I was shouting, screaming, he was too. And he slapped my face a few times and pushed me to the ground. He did apologise. He said he just wanted to make me stop. I have let it go, it's ok now. But I can't forget about it. From time to time whenever there's a disagreement, I low-key feel scared. I know it could've been a genuine mistake or maybe not. What should I do? What would you have done?

Tl;dr _ hitting in a marriage? One time mistake or something more serious?