How can I improve myself after days of living in fear?

I barely maintain a lengthy conversation with others, I dont know what can I do for work? I have never applied for a job or even thinking of going for an interview. I feel like giving up in life, though ppl around me treat me fairly good. They dont say that I stank or anything but internally, I feel like I DO. I gradually refuse to live, withdraw myself from social interaction and then what, my brain rotted. Fuck I cant even open my mouth. Im a failure fucking failure cant do shit.