Often I doubt whether I recited al-Fatihah or not, so should I repeat the rak'ah or consider this waswasah?

Question:
Many times I doubt whether I recited Surat al-Fatihah in the prayer or not? If that is the case, should I repeat the rak'ah or why do you advise me? Or should I consider that waswasah? May Allah reward you with good.

Answer:
If this is waswasah and it happens to you frequently, do not pay attention to it. However, if this is not waswasah but rather a doubt that occurred to you, then it is either that you are praying behind an imam, or you are praying alone, or you are the imam. If you are behind the imam, reciting al-Fatihah is not obligatory for you; the imam's recitation is sufficient, praise be to Allah. But with this, you should strive to recite it behind the imam during the imam's doubts. However, if you leave it out or doubt whether you recited it, the imam's recitation is sufficient, praise be to Allah. As for if you are praying alone or are the imam and you doubt whether you recited al-Fatihah, then you recite it. If you are in the rak'ah in which you doubt you recited it, you go back and recite al-Fatihah and do everything associated with it. As for if you have started another rak'ah, you consider the first rak'ah, in which reciting al-Fatihah is sufficient, to be valid, and you consider the rak'ah after it to be the first, and you complete your prayer in this manner. Then you prostrate for forgetfulness at the time of the taslim, either before the taslim or after the taslim; both are permissible, praise be to Allah. May Allah reward you with good.