Salaat

Assalamualaikum Mufti Saab
At a public gathering 2 of us decided to make jamaat at salaah time,i was the imaam,by the end of the salaah 25-30 people had joined the jamaat.i am almost certain my wudhu broke during the salaah.i was not sure so i continued leading.
What do i do now? i dont know the people who followed me in salaah and probably wont know them if i ever meet them again.