If an imam has doubtful recitation of Fatiha should I pray behind him? And repeat prayer? What should I do if I find out during the prayer, should I leave it and pray on my own 2. Can I use AI apps for counselling which speak to you? I am using one that is modelled on real coaching sessions

Ustadh AbdulAziz al-Haqqan
If you suffer from waswas, please let us know in the beginning of the question so that I can know how to answer in sha'a Allah.