Is it necessary not to lengthen the "ya" in "ad-dalleen," and how can the letter "dad" in "al-maghdoub" be pronounced without emphasis?

We ask Allah the Almighty to grant you a speedy recovery from the whispers and doubts you are experiencing, and we advise you to ignore them and not pay them any attention. Regarding the elongation of the word "al-Dalleen" (the astray) or the pronunciation of the letter "Dhaad," as long as you pronounce them like some skilled reciters such as Al-Shuraim, this is sufficient and your prayers are valid.