I dont get it?

Is there ever someone in your life that you dont think will ever understand you? I do! I dont understand where she is coming from ever! We used to be so clase and had a wonderful relationship and now its almost obselete. It hurts so much because its my Mom. The one person I need right now is constantly putting me down, and picking fights. Sometimes I dont even recognize her anymore. She has changed so much in the past 8 years. Sometimes it feels like she is two different people. I am at the point where I just want to give up and throw in the towel. I dont know how to get thru to her or make her understand what she is doing.