Help please!!!

So my mom and I have always had a rocky relationship. We are both pretty verbally abusive when we start to fight. I am so ready to move out of the house in a month for my apartment. I am responsible for paying for the apartment obviously and food. However, she is paying for some of my college and car insurance. I told her when we were fighting I don’t want her in my life anymore if she is going to continue to bully me. She said fine. Now I am going to have to figure out how to pay for apartment, food, car insurance, college and miscellaneous items. I am so stressed right now. I don’t know what to do. I am living with my fiancé and he can help, but he also has college to pay for.