I have to get out of my parents and get me a place this place is toxic and negative

My whole life even when I was a kid I had to grow up fast because I was and still am dealing with an unstable father who decides not to take his medicine, who's mood is a roller coaster and bad stuff happens when he decides to not take his medicine who is un predictable, has seizers,  schizophrenia, depression, and rage, 
A mother who is unstable, disabled, has health problems, un able to work, and isn't in the best of shape 
So I'm around to take care of all these problems by myself because my siblings and I don't get along and 
considering I am the only sibling who still lives at home I feel like all I do with my time is take care of them be in this stressful environment and makes me feel like I'm falling behind in life because I'm too stressed out about them.. And what they need.. And feeling bad cause I have to leave not knowing what's gonna happen when I leave them alone.. 
I've been trying to save up and get my own place that is my goal and now that I have myself on a housing list all I can do is wait until I'm able to get in an apartment until then life is just really hard..
What else can I do?
I'm beyond stressed.,
Advice!!??