Overwhelmed!

So, I'm moving out of my parents house for the first time in about a month. I've just quit smoking a month ago. My dad is suffering from some kind of self-esteem issues and thinks he's ugly, old, and fat. My mom seems to be experiencing the early stages of dementia. Oh, and I go back to college in September in a different city. So life is currently quite overwhelming. I have a lot of things I need to do to get ready to move out, and now I'm worried about both my parents... I just don't know what to do with this. My mom accidentaly consumed iodine last week because she thought it was something else and I had to call poison control for her. My dad shaved off his mustache today because he thinks he's ugly. I got drunk while sorting through old files and shredding old bank statements. I don't know what I'm doing, I don't know how to do this. I don't know how to be "the responsible one" and I'm terrified.