Family breakdown

My mom just left my house. im having a mental breakdown. I don’t know what to do. My mom and dad went on the boat today. She came home, obviously drunk. And was just yelling about everything. She randomly comes upstairs and says me and dad are getting a divorce. and we of course dont take her seriously, she says it all the time shes drunk. Then me and my brothers get annoyed because she wont stop saying how bad my father and we are, so we all just say we’re gonna live with our dad because she is annoying us and doesn’t know when to stop talking about something. She continues to yell about various things…saying she wont give me money for europe, hoping I fail my road test, im a horrible child, we are all ungrateful, I have to clean my room, etc. We’re all extremely irritated. It was my brothers 22nd birthday yesterday, so my grandma was coming over for cheesecake. It just gets worse. My dad and brother refuse to eat. I love my mom still, I saw her make that cake last night for a long time, I know she does work hard for us, so I felt bad about my brother and dad. My dad just smiles as he walks around the house like he’s happy my moms psychotic. He doesn’t speak, just smiles. My mom asks if he wants any cake, he says no. My brother was like I was all excited to come home for the cake and then you decided to be a b*tch and ruin my night. I mean I would be hurt if my son had said that to me, but my mom was being rediculous. I honestly don’t know whats happening. I’m an emotional wreck. I went upstairs crying after that. My mom later comes up and says shes leaving because shes not wanted here. I told her if she changed how she drank and acted it may be different. she wouldn’t tell me where she was going. Just that I may see her in a month? if that. Of course im crying, I love my mother and I don’t want her to leave. About 20 minutes later I go to wash my hands as she comes out of her bedroom. She says good luck on your trip and then goes towards the door. I ask where shes going and she just gets her bag and leaves. I don’t know what to do. I haven’t stopped crying. Im turning 17 next month and im going to europe. Just this very minute my mom texted me saying “now I know how carol feels” Carol is a good friend of hers who just lost her sons to their father. I am going crazy. what do I do? helppp. please.