Sorry for taking so long to respond. I know it's no excuse for acting like a spoiled brat (which I was) but I was having a stressful day. I've been thinking about all of your replies (thanks for your insight) and it really has given me some perspective.

In response to whoever thought it was stupid to get triggered by a grocery run, I do realize that it was a stupid thing to flip out over. But that's what it was- a trigger. I think I've been worried about the family's financial status for a while now and I'm not doing well with not knowing exactly how bad (or not bad) things are. It's that uncertainty that worries me. I think that I was probably told no to the grocery run because it was late at night and I didn't really "need" anything. But deep down, it set me off because I wonder how bad things will/could get.

But I think the underlying issue is that I don't deal with change well. I think I have purposefully been choosing to turn a blind eye and dig my heels in when people suggest I get a job or something because I don't want to accept that things have changed. I don't want to take responsibility and get a job because I don't want to take risks and enter the "adult world". I realize that I've lived a sheltered life and I'm afraid to face the world. Blaming my parents won't help. I see that. This is my issue and I will talk about it with my therapist.