Cleaning house

My parents have been getting into a lot of fights lately. The worst was last Friday night (now the Katy Perry song is running through my head). I was cleaning the bathrooms, and I moved the toothbrushes around so I could clean around them and all that, and naturally all the toothbrushes got jumbled together - including my dad's. Now, if we had only one toothbrush per person, it wouldn't be so difficult for me to sort them out, but we have about thirty-odd toothbrushes in the main bathroom alone. So I went around the house asking people which was their toothbrush, with the idea that I would just bleach and bag the rest of them (goodness knows why we save so many toothbrushes - we'll never in this lifetime or the next use them all for any purpose that I can think of). When I asked my dad which was his, he said, "You have got to be shitting me" and started swearing up and down. I kind of lost it; I was the only one cleaning and the house was a wreck. I was sick of all of it. So I threw the toothbrushes all over the hallway. My mom walked me outside, and we leaned against the Mazda and I just started cussing Dad out. I couldn't shut up. I went on and on about how dirty the house was and those 8 cats that we own that he would hardly let outside and those 8 cars - most of which don't even work and aren't being fixed - that he kept in our driveway and for goodness' sake couldn't he ever let anyone be? Mom didn't even stop me from calling him a fucking asshole - which I did several times. After we went in, she dragged him outside and they had a huge fight. They were yelling and swearing and my mom kicked the garage door and dented it because she was so mad. She went into her room and slammed the door. After about five minutes I went back there and knocked, and she let me in. She told me she wanted to move out. I didn't think she would. I know she loves my dad. But still, I've never heard her say anything like that seriously, and it freaked me out. That was the big event of the night, although the chaos continued until after I went to bed. I never figured out why, but my brother ran crying out of the house, and my sister was yelling about something, and my mom and dad argued off and on for the rest of the night. When I woke up the next morning, my dad had left for a black belt workout several hours away, and my mom had stayed home, even though they had originally planned to go together. That night when he got back, he brought roses for my mom, and it seemed like they were okay. They haven't had anything nearly as serious since then, but it's never peaceful at my house, and I'm worried.
I haven't even attempted to clean the house since then. Tomorrow I'll try again.