I Am Frustrated

Today is the day of a practice test for an up coming test. However, it requires a registration whose deadline was a few days ago. My mom wants to take me to school today where there will be mainly just proctors who just hand out the test and my mom wants to get me in last minute. I try telling her that it's not going to work and that we'll just look like fools, but she won't listen to me and instead just gets angry at me