Honorable scholar since many days I was really depressed and panicked because my father's health wasn't good. Alhamdulillah he is fine now.
But in this tension I started having the symptoms of Panic attack and Depersonalization. Actually this happened to me few years ago as well but my spiritual guide recited some Ayahs and Duas which cured my problem. That blessed person is not in this world anymore.
I wanted to request you to please inform me about any Surah's aur Duas that I can recite so that my problem is cured.

Kindly perform Aamal e Ashoora for 40 days
Inshallah every thing will be fine
And in qunoot of your prayer recite ayah 28 from sura raad

Holy Quran 13:28
الَّذِينَ آمَنُوا وَتَطْمَئِنُّ قُلُوبُهُم بِذِكْرِ اللَّهِ ۗ أَلَا بِذِكْرِ اللَّهِ تَطْمَئِنُّ الْقُلُوبُ

Those who have believed and whose hearts are assured by the remembrance of Allah. Unquestionably, by the remembrance of Allah hearts are assured."