My mother makes my life feel like living hell. What should I do?

I’m 16 and can’t move out for another 2 years. I know a lot of teenagers have problems with there parents, but I really don’t think my situation is typical.
My mom is verbally abusive, and calls me fat and tells me how bad I look all the time, (even though I’m a perfectly normal weight for my hight). She is constantly telling me how out of control my diet is and how I need to stop eating so much, even though I eat the right amount for my high exercise life style. My self confidance often is extremely low even though I know in my brain that what she says isn’t true.
She verbally attacks me on a regular bases, even when I’m not doing anything wrong at all. Just this morrning she came barging in my room when I was studying for a test and started screaming at me about how messy the house was and how I never listen to her and what a bad kid I am. This wouldn’t be so crazy if it weren’t for the fact that she is a hoarder and the house is messy because she has and endless amount of things that she won’t get rid of. In fact, when I asked what she saw that was mine that I needed to pick up, the only things she could find were a few hair ties and 2 water glasses.
I always try to stay calm in these situations, but she will not stop screaming at me until I finally yell back. Then the second I do she grounds me for “being rude and back talking”. This morrning, for example, after she yelled at me for 2 hours straight while I was trying to study, I raised my voice and told her that she was making it impossible for me to focus. After that, she took away my phone and said she was keeping it for the next week because I was rude to her. This is the phone that I bought for myself and pay for the monthly phone bill.
I know I’m not 100% innocent, and sometimes I am in fact rude just like any other teenager, but the majority of the time I get attacked by my mother. I am a good kid; I don’t drink or do drugs, and I get all A’s, but no matter what I do she screams at me on a regular bases. I truly just don’t know what to do or how to get out of this horrible situation.