Quarter-Life Crisis

Yes, there is such a thing.  I'm living it and you can't tell me any different.  I thought my previous post would help ease the feeling of being overwhelmed, but no; here I am still stuck in a rut.  How do I get away from my own thoughts?  It's like my brain will not shut the fuck up and just let me be.  I don't want to think about life; I just want to work, sleep and eat for once without a worry.  I need a shut off switch.  I've tried drinking and it doesn't work.  I'm not cut out to be an alcoholic I guess.  Somebody save me from myself.