What can I do when I feel I lost my mind?

I have a mental illness and it's spirilling out of control I'm losing my self control it's making me cry everyday I've been crying for so many years I don't do anything like work cuz I can't function enough to keep a job it effects my relationships and I just don't know how to deal I don't want to end up like people that be going crazy in the streets

What can I do when I feel I lost my mind?
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