My mother tried to take my phone from me today because of a pair of socks

I am completely devastated today. Since dawn, I haven't been able to stop crying. I returned home after three weeks at my aunt's house because I was on vacation, I missed my mother a lot and wanted to be close to her. But then I found out that my ex-stepfather had been cheating on her for three years while they have been separated for only one year, she tried to take my phone from me because of a pair of socks because I didn't want to put them on her foot, blamed me and was very harsh with me because of my depression and didn't apologize. I want to kill myself. I wanted her to be more understanding with me, be my friend. And I can't stand her making me cry anymore. She threw in my face that I don't leave my room anymore and don't go to school, I spend more than three days without showering, I don't eat. It's not my fault. I don't do this because I want to. But she doesn't seem to understand me. I just wanted to take all the medicines in this house and kill myself.