P.K.
I don't think there is an age that's 'too young' to exhibit anxiety. I have OCD and wasn't diagnosed until I was an adult. I'd lived a secret life since I was a very young child. Somewhere in my early childhood I became afraid of vomit, gross right, but not just afraid totally paralyzed by the thought. If someone at school was sick I'd have to go home too because I was terrified to be in the same place where the sick kid was. I became terrified of public bathrooms because someone might come in and vomit. I wouldn't get on rides at the fair because I might get sick. By the time I was 18 years old I was 5'6" and weighed under 100lbs. I'd gotten so bad that I wouldn't eat anything because I was so afraid of what it would do inside my body. After much therapy I am in control now. I still have a hard time sometimes. As a kid my teachers and my parents treated me like I was being intentionally 'difficult'. I have a very good relationship with them and always have. Once they understood what was really going on they were able to be supportive. Both of them had no idea that anxiety could effect someone so young. It is normal at that age to fear death and suicide. But if it is having an impact on her daily life and is occupying her thoughts so much that she is getting upset about it you might consider talking with a therapist. You can find out if she's just fixated on this issue because it's fresh in her mind from something she heard about or whether there is a bigger problem with anxiety in general. I thought my anxiety was 'crazy' so I always hid my problem and didn't tell anybody that I stayed up all night worrying or that I hadn't eaten in 2 days because if I was hungry that meant my stomach was empty and therefore couldn't throw up. Even if she's experiencing a long term anxiety disorder you can start now and help her learn to deal with it. Most likely she's dealing with acute anxiety over a single fear that will go away.