Horrible argument, led to beating?

3 weeks ago I got into an argument w/ my dad, I forgot what it was about but at the end we all agreed it was my dad's fault. He got mad and threw a teapot and I didn't yell at him the whole argument. I was extremely calm, Buddha calm... and after that, I almost blew up. I have a hot temper and so does my dad, and I can't hold things in, I've tried. I go insane. Especially as a16 year old, I'm a good kid. I don't go to parties, get drunk or do drugs. I was best friends w/ my dad and we watched TV every night together. Very close. My mom never spends quality time w/ my bro and I. She seems to like my bro better and I've talked to her about her neglectfulness but she's too focused on her career. I already have some resentment towards her even when we do get along because I'm very family oriented and she isn't interested in my life. I got into an argument w/ my parents tonight because they leave the phone off the hook and no 1 can use it the rest of the night and they came back at me w/ a "You need to put your dishes away" and I'm sick w/ the flu and said I didn't want to get any1 sick. I was in a bad mood. I don't do the dishes but I organize when dad's at work and give great advice to them. My mom doesn't really work, she's a musician and so she always tells me I should clean cuz I'm a woman, but she is a housewife... she doesn't take her own advice. The argument escalated when we all agreed to drop it but my mom said 3 mean things under her breath and I responded. Then my dad (5 min later) told me off. He has a HOT temper, so even tho he's usually very sweet and caring, he blows up. I got so mad (my life is mundane, my ex bf whom I loved dearly moved out of state, I want attention from my mom cuz I love her) cuz they were like "SHUT UP" and I threw a bowl at the floor. I was so angry. Anyway, every1 was screaming and my dad threw a cup and I cussed for the first time in my life. It got so bad that my dad grabbed my arm, threw me to the floor and kicked me, wouldnt let me get up and pushed me again and again and I fractured my arm. My arm is huge. I am traumatized because I love my dad so much. My brother, who was there watching said it was brutal and he can't believe it. What should I do? My dad apologized (he does everytime there is a huge argument) but this probably changed our relationship forever. I don't feel safe anymore. If I can't trust my father, who can I trust? And I thought that violence was never the answer. As parents I think they should be more in control and to never lose it the way he did. They said they provide everything for me, and I appreciate it, but if they didn't, I could call the police. They made the commitment to love and take care of their child when they had me. They should never lay a finger on a girl. No matter what the cirstances are! I understand that I should help more around the house but I was feeling rebellious, sick and angry because my dad irritated me several times today. I will not call the police though, because even though my arm is huge, I know he isn't a bad person. He blows up like this whenever I provoke him, but lately even when I don't, he blows up. Maybe man-menopause? If that's possible. My god father says that they don't understand how to raise teenagers and should understand that after my first love left me (recently) I am still hurt inside. They didn't help me through that. But I am so shocked- and scared because my dad was my hero. And he beat me. What do I do?