BF3 controller bug first mission 2025

Hi everyone..I have recently installed battlefield 3 to my lenovo legion go via steam and I began playing the first mission of campaign with the controller of legion go..however after a few minutes of playing when a guy popped up in the train and tried to assault me I couldnt do anything to throw him out of the train because controller didnt work. A mouse picture showed up with the left button flashing and because I played with controller I couldnt do anything with any mouse..I am stuck now for days..help pls