Can you repress a single, smaller memory?

So I think I get the concept of repressing memories: your brain locks away traumatic memories and you don't remember them ever having happened, basically. But I can't fathom NOT knowing something major that happened to you. It's a concept I can't seem to grasp. If its years of your childhood you can't remember it seems a little different, because obviously there's something missing and there are usually other signs that there was past abuse. But what if you were abused once and it wasn't something super obvious physically like being beaten or d might be? Just something really uncomfortable and traumatic because of your age so you don't remember that one event? Could you not remember that one small event and go on with your life thinking you're normal and nothing bad has ever happened to you because you've repressed the one bad memory and no one else ever knew about it?