My mom yells makes me mad all the time and I keep from yelling back. But sometimes it gets really hard because all of the little things build up. So when I yell and get angry she tells me I'm not allowed to yell and sends me to my room where I calm down and then apologize. I then later  talk to my mom and ask her to please stop doing whatever she was doing. She has always told me that I can ask her to stop but when I do, she yells than won't listen to what I have to say. She just makes excuses and yells again.
My parents are divorced and I live with my mom every other week. My stepdad has changed her way of seeing things and now she can only see the bad in me. What should I do?