I'm worried and stress!!! Is My BP dangerously high?

I'm 15 years old, I'm 5.8 feet tall, weigh 134 pounds. Oh, and Im a girl. This morning I hade my blood presure checked. It was 146/102 idk how bad it is my mom said it was bad but not exactly how bad. Does anyone know how bad? I've taken stress quizes online and the all seem to say I'm really stressed and that I need to find better was to cope any advice?