Is it normal that my brain represses every bad thing that happens to me?

Is it possible that a brain can repress NON-traumatic and life threatening stuff? As a kid supposedly a lot of actal traumatic things happened to me which i don't remember because my brain probably repressed it since that's generally what brains do to help people cope. But now it's gotten to the point where if ANY bad things happen to me, traumatic or not, my brain represses it (i believe). Like if somebody says something slightly mean to me, my brain will instantly forget it and i'll never remember again that they said it to me, but if it's like a fight with my parents, i'll go into a sort of amnesic state and my brain will i guess repress the information & if they try and speak to me about the fight, i will not know what they're talking about. I recently discovered this is what my brain probably does and was just wondering if it was abnormal to forget every little bad thing that happens to someone. ps,not to sound disrespectful but i'm kind of happy that this is supposedly what happens because i'm happy mostly 24/7 probably because of this and all my memories are happy. But it can be bad because i can't remember most of my life due to this. Hopefully this made sense to at least one person I tend to ramble, clearly.