Being chronically ill and young is terrifying and it feels like nobody gets it

I’m 15 and have been chronically ill for three years. It feels like a big deal for me but nobody seems to take it that seriously. I probably sound so mature and like I have too much of an attitude, I don’t mean to - sorry. I know a lot of people in here are probably older than me and have been sick for longer than I have been. I get that. I’m not disrespecting that. I just feel, I don’t know, it’s the same as if it was a 2 year old. Would you be at peace with an infant getting this illness? It’s a young age for any person and it feels like nobody would be okay with it. I’m clearly biased, I’m the one going through this, but I don’t want to lose my youth and my years to this. I know I will. I will have to live this way the rest of my life, but nobody is even upset by it. I’m looking towards a life of disability and chronic pain. It feels like nobody cares. I just want someone to get how I feel.