It can be especially helpful to keep on praying for holy spirit. The fruitage of the spirit includes such qualities as joy and peace.
فَسَيَحُلُّ ٱلْفَرَحُ مَحَلَّ ٱلْحُزْنِ وَٱلسَّلَامُ مَحَلَّ ٱلِٱضْطِرَابِ .‏