Wa'Alaykum As Salam Alaykum as Assalamu’alaykym,
If you are sure you broke wudu, i.e. you are sure you passed wind then obviously you have broken your wudu so you need to leave salah go and make wudu and if you came back and jummah is over then you need to pray Dhur instead.
If you are not sure and you had a doubt,this could be waswassu, whispers from shaytan so just continue salat, you didn't smell anything or hear anything, then In shaa Allaah you still have wudu and this was from shaytan so continue and ignore it. This also happens during Wudu etc you are NOT to repeat, just continue. Otherwise you'd be just obeying the shayateen
wallahu alim.