Im not okaay rn and im scared

My mum is super sick, like, if she ends up in the hospital she aint leaving it. And that realisation just made me realise that when shes gone i wont really have anywhere to go. My 29 yr old sister is on drugs and just got her kids taken off of her, my dad is an idiot whos going to end up back in jail, my 26 year old brother is recovering from cancer and has to look after 3 kids all younger than 10, my pop is busy looking after my nan who has dementia and all my other family members are people i dont even know. Im so scared of being alone and im so scared of losing my mum. I feel like everything is falling apart and its not even falling apart yet.