Kindly refer to the following link(s):
Should I pray the Salah again if I did not pray with Khushu (Concentration)?-
Can I repeat the Fateha if I did not focus properly while reciting
Forgot to recite Fateha, Should I pray an extra rakah (Behind imam or Praying alone)
Does repeating a Word or Ayah from the Quran during prayer nullify it?
Waswas in Wudu & Prayers, he keeps repeating the Ayahs, what to do?
I have OCD, waswas in intention (Niyyah) when praying and I keep breaking my salah