When I'm praying and I forget which rak'ah I'm in...- Towards Eternity - Khoshoaa in prayer is something that we should achieve, that means that we must be focused and feel fear and that we are in front of Allah Almighty worshiping Him in the best way. But if we get confused and forget, we just pray the rak'ah we forgot and we make sujoud sahoo before tasleem at the end of the prayer.