Any help?

I have sever narcolepsy but have not been diagnosed. I have been trying for almost 3 years and I want to get a service dog but they are to expensive for my family to afford. Can anyone help me find someone I can get a cheap narcolepsy service dog from? I'm not allowed to go out anymore and have a teenager like I barly had a kid life bc I couldn't run around and play bc of my narcolepsy and I miss going out and playing with my family and I would love to do that again as soon as possible