Please help; called DCF and is scared?

I'm 17. My mother and I never really got along and out of nowhere she'd get mad and will be in my face in one second. She'll scream at me. Last week she bruised me forcing me to go upstairs when I didn't want to, I wanted to talk to her about why she was being like this. Yesterday, we had another argument. She got in my face again, told me she didn't care about anything anymore and to get out of her face and leave... So guess what I did...? I took the car and left. I was in panic mode all day. I didn't know what to do. It turned out to me calling DCF for some direction and uncertainty as to what I should do.... They stopped me midsentence telling me my mom did nothing illegal and that if she wants me home I should go. I went home. And now they're coming over today... I don't want my mom arrested or anything I love her with all my heart. I just think she needs help with her anger... And I'm scared to death. I didn't sleep at all last night. Please, help?