Struggling to Adjust to Living with Family

idk what to do anymore. Today I got back from house-sitting for a week. It was so nice to have a house to myself, but coming back I'm having a hard time adjusting to things living with my family like who has what when, there's going to be lots of noise that I don't cause, even which bathroom to use. My forgetfulness and struggle to readjust along with my normal problems has already caused so much stress and even lead to my mom and I fighting. She apologized for yelling and stuff but I still feel like it was my fault and I deserved it. I feel like such a burden and I wish I could move out to make everything easier on everyone, but I can't get a job or keep up with my half of the Netflix bill that I split with a friend- let alone pay for housing/food/utilities/etc... I feel so worthless. Everyone else my age seems to have their life together but I can barely even call to set up therapy appointments. My depression is setting in, I'm grinding my teeth really hard since the fight, and I think the fight may have triggered my PTSD but I can't quite tell. I wish I could just disappear...