My family always brings me down and now D.Y.F.S is coming? How do I deal with this?

This past year I have been going through depression and anxiety attacks. I missed school so much that because of my illness and the treatment that I have to take summer school to make up for it and to pass the grade. It's everyday and I have missed it a few times because of my weird sleep schedule. I have trouble sleeping so I stay up like all night sometimes and then crash during the day. The school said that if I miss one more day of summer school that they would call D.Y.F.S on my family. Well I missed it today because I was sleeping and now D.Y.F.S will probably come to my house tomorrow. I'm really scared and I don't know how to deal with this again. D.Y.F.S was involved with my family last year and I was so afraid so them coming back, it's one of my greatest fears. Should I just let them take me into an orphanage? Should I just run away? Kill myself? I don't see why not, no one in my family wants me. Today my brother told me that I should just go die and I'm so fat. I have a terrible self image and everyday when I look in the mirror I hate everything I see. So what he said didn't help me at all. Also today my mom said that she wishes I was never her child, I'm just a big problem and that she wouldn't care at all if I ended my life. This hasn't been the first time that my family made fun of my appearance and said very hurtful things to me. I just don't know how to deal with this anymore. They make me feel like a waste a life. What should I do? and what should I prepare for tomorrow with D.Y.F.S?