I'm going through an age panic

I'm young and starting a higher level of school and I just had the most SURREAL feeling of the thought that my life is over. I'm not a kid anymore. I'm going to grow old. I'm going to have a life ? I don't know I'm scared. I'm going to get a job ? I'm going to actually BE IN my future ? It gives me a headache thinking about it.

Edit : STOOPPPP YOU GUYS ARE SCARING ME WHAT o(TヘTo)