In the name of Allah the most beneficent and merciful

Did We not expand for you, [O Muhammad], your breast.

And We removed from you your burden.

Which had weighed upon your back.

And raised high for you your repute.

For indeed, with hardship [will be] ease.

Indeed, with hardship [will be] ease.

So when you have finished [your duties], then stand up [for worship].

And to your Lord direct [your] longing.

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 the Ayat 3:134 of Quran is very effective in calming anxiety and controlling anger:

3:134 الَّذِينَ يُنفِقُونَ فِي السَّرَّاءِ وَالضَّرَّاءِ وَالْكَاظِمِينَ الْغَيْظَ وَالْعَافِينَ عَنِ النَّاسِ ۗ وَاللَّهُ يُحِبُّ الْمُحْسِنِينَ

Translation: Those who spend both in prosperity and in adversity; who are restrainers of anger/rage, and are forgiving to people;- for Allah loves those who do good;-

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dua from a well known Kiyai (Islamic Teacher) in my country

Allohumma rohmataka arjuu, falaa takilni ilaa nafsii thorfata ‘ainin wa-ashlihlii sya-nii kullah, laa ilaaha illaa anta
“ O Allah, to your blessings I hope. Please do not leave me to myself even in a blink of an eye, please fix all my affairs for me. Theres no God except you”