grrr, my mum is making me mad.

I have to go to get an MRI done on my knee and she has to come pick me up from school. Well the weather is supped to get bad, so i don't want to go home and be bored all weekend. So I told her that we should just cancal the appointment. Then she gave me a lecture about how my health is important. Then I replyed "but I hate going home...." then right as soon as I said all that, she hung up on me. I don't even know if she is talking me to my appointment.

Now I don't know what to do. I hate it when she hangs up on me.