what causes poor handling when driving on 2003 Toyota Corolla

Im driving a toyota tazz 2003. recently i picked up a knocking sound coming up when driving on the left front. also when i drive the car moves sideways and i have to hold the steering wheel tight not to lose control.i have checked the tyres and alignment, i think its fine. what can be causing this i'm really concerned

Asked by for the 2003 Toyota Corolla