My parents are fighting all the time and it's starting to affect me

My parents fight a lot and even when they're not fighting there's this heaviness in the house that never goes away. I've gotten really good at staying in my room and keeping my head down. But it's started bleeding into everything else. My mood, my sleep, my focus at school. I don't really talk about it because it feels like it's not my problem to have. But it kind of is. I started realizing that the tension at home was affecting way more of my life than I'd admitted. I also hadn't really thought about the fact that I'd been protecting my parents by not talking about it. Like I was carrying the whole thing alone and calling it normal. I realized that staying quiet wasn't protecting anyone. It was just making me more isolated. I thought about one friend I actually trust and whether I could tell her even just a little bit of what's been going on at home. I decided to tell her something small. Not everything. Just that things have been hard at home lately. That felt like enough for now. I also realized I needed to actually get out of the house more instead of just hiding in my room waiting for the tension to pass. Even just going for a walk or sitting somewhere else for a while made a difference in how I was feeling.