~If your Stress is caused by Duniya, Your dhikir is
"La ilaha illal-Allah"
for it brings to mind that there is nothing worth fearing or adoring but Allah.
~If your Stress is caused by People, Your dhikir is
"La hawla wala quwata illah billah"
for it brings to mind that people have no power.
~If your Stress is caused by yourself, Your habits etc, Your dhikir is
"Astagfirullah"
for it wipes away sins which is the chief cause of anxiety.