I was recently diagnosed and I am confused

I didn't know I had this disorder. My parents and I thought it was normal and I was just suffering from being underweight until my health and mental health deteriorated this year. My father took me to a psychologist for the first time to see if I had any psychological problems. After about two hours, he diagnosed me (my BMI was 12, with most of the symptoms of this condition) with anorexia nervosa and obsessive-compulsive disorder.

Well, I'm confused and don't know what to do. I want to recover, but the thought of gaining weight worries me, and I think this is better. My family has started pressuring me to eat more than I normally eat or tolerate (I have some trouble recognizing hunger cues and other things), but I get angry when they force me to eat, and I say I have no problems. I'm really confused. Any advice?