The Messenger of Allah (ﷺ) said, “The supplication of the anxious person is -

اَللَّهُمَّ رَحْمَتَكَ أَرْجُو، فَلَا تَكِلْنِي إِلَى نَفْسِي طَرْفَةَ عَيْنٍ، وَأَصْلِحْ لِي شَأْنِي كُلَّهُ، لَا إِلَهَ إِلَّا أَنْتَ

Allaahumma rahmataka 'arjoo falaa takilnee 'ilaa nafsee tarfata 'ayen, wa 'aslih lee sha'nee kullahu, laa 'ilaaha 'illaa 'Anta

O Allah, I hope for Your mercy. Do not leave me to myself even for the blinking of an eye (i.e. a moment). Correct all of my affairs for me. There is none worthy of worship but You. Prophet (ﷺ) used to say this supplication increasingly.

Reference: [1] Hasan. Abu Dawud: 5090 [2] Bukhari: 2893