[††BlackRose††]

I understand where you're coming from since my mom says pretty harsh things too when she gets pissed. But I actually take it otherwise she raises hell. lol.
But honestly what i've learned with my mom is that you can't let it get to you. She's your mom in the end of the day and she prob still loves you (though showing it may be a different story). See your faults and next time try to act calmer. If she says you're ugly then think that you're not.
It's like an emotional bully. You can't let them know its getting to you. Give her a hug afterwards and apologize (even if you really don't have any faults in the situation). This will help keep the peace. If you need to vent your anger out just come on here and do it :P. lol.
Sometimes it also helps to try and see where she's coming from. Honestly you learn to work your way around the fighting. Tell her that you love her (even if you don't mean it 100%). Just give her what she wants to hear and it might be better. MIGHT. lol.
I don't know if your mom is like mine, but if she is then this may help.