EmilyRyan, you're asking about getting a low cost diagnosis on the wrong board, okay? Nobody here knows of anything like that. It may not even exist. "The system" is not set up to help autistic people, that's why so many autistic people are homeless right now!
Dena is right. You need to set your life straight one day and one dollar at a time. I am on the spectrum and with hard work my symptoms have gotten much better, so much so that a psychiatry PhD student refused to believe I was on the spectrum (my psychologist knows better, but he's better trained in the symptoms). You can train yourself to make eye contact, for example. This is hard work and you have to work at it every day. You can desensitize yourself to touch. Push yourself. You can develop coping skills to make up for your cognitive deficits. Really.
You can have some of your dysphoria issues addressed in months. Get a job, get a therapist, and get on low dose hormones. Meanwhile, your life is keeping you busy now so you won't feel as dysphoric. Sitting at home ruminating about how your life sucks is sending you down a deep dark black hole that looks so deep you think you'll never crawl out of it. But you will. Moods are temporary. Moods pass. Moods don't define you.
If you can't get a job, get a hobby that doesn't involve the internet. Go outside your house and start collecting leaves. Or insects. Start taking cellphone pictures of birds. There are lots of free solo hobbies if you think about it. Something that absorbs your interest and takes your mind off dysphoria. I used to take pictures of trains, lol. My pictures are terrible, btw.
Maybe in the midst of all that, if you keep looking, you'll find the answer on diagnosis you're looking for. You know they say when one door closes, another opens. This door seems to be closed so you need to engineer a way around that door. Well, to do that you need to take care of yourself. Get yourself a crummy little temporary job and put some money in your pocket and eat up those hours you now spend feeling sad and abandoned and hopeless.
Btw, why won't your parents help you to get a diagnosis? Do they lack money or is it some fight over whether you're really ASD? I suspect if you have an income you might have some leverage to ask them for a loan or a gift to help pay for the diagnosis. I was able to bank $3k living at home back in the late 1990s and there's no reason you can't do that now. Not being diagnosed as disabled can be a good thing because the minimum wage for not disabled people is much, much higher than the minimum wage for disabled people, so chew on that for a while.
http://america.aljazeera.com/articles/2014/3/27/goodwill-paying-penniesperhour.html