I can understand it yaar… these up and down in life comes and gone.. its like a huge depression feelings.. what I do when I have depression.. in my free time I pray a lot of Astghfar, darud shreef, and SubhanAllah, AlhamdoLillah, Allah ho Wo Akber… u can recite those during work either. jab bhi kuch galat khiyal dil main ae please is ko bar bar duhrao even ke ye apke zuban ke sath dil wo dimagh pe bhi chha jaye. Allah Tallah ham sab ka hami wo nasir ho Ameen