Therapy and anger

My mum tricked me into making an appointment with a therapist, and I don't know if I should cancel it or not. I mean I probably could use it, but I don't really want it. She wants me to go because everybody is afraid of me, little babies, how can you be afraid of a five foot two inch girl. Even my friend is afraid of me and he only knows me over the internet.
I have anger issues, but they aren't as bad as they used to be, and I only get angry when people don't listen, like yesterday or maybe the day before, I was trying to explain something to my mum and she kept interrupting, because she thinks she knows what I'm trying to say, so I got really angry, who wouldn't get angry at that?
Plus she thinks I need therapy for other stuff like my hallucinations, paranoia, eating disorder and my OCD, the only thing I want help with is my OCD, but I'm working on that myself, but I wouldn't mind some other help. I don't know I'm thinking maybe I should give it a few tries the lady sounded nice.
I really just don't want to get emotionally and I don't want to get tricked again.