You are considered ill and that is why your prayer is valid and you shouldn’t have repeated it.

24 Today while praying my fajr prayer in congregation,I said ameen loudly after the imam finished soorah al-fatiha but because of the satanic interruption I said another ameen a little bit loud while the imam was reading some other soorah other than soorah al fatiha,was my salah valid or not? As a precaution, when the imam finished the salah,I stood up and prayed this fard salah on my own so that I may not be sinful in case my first salah with imam is invalid. Was this ok?