İs it right quit taking antibiotics for a sinus infection in three days if it does not alleviate the symptoms?

hello. I have been suffering from chronic sinusitis. as I know, antibiotics start working in 72h, if it does not alleviate the symtoms. I quit taking them. should I take all of the antibiotics that are prescribed?
İs it right quit taking antibiotics for a sinus infection in three days if it does not alleviate the symptoms?
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