Mouse not working in game

I am trying to play bf3 but every time i load in, my mouse works in the menu, but when I get into game my mouse stops working and I can't look around, zoom, shoot, etc. i have read a thread on this but it talks about disabling origin, however i am loading it on EA and there is no option for "origin." therefore, i can't play the game, and i have tried relaunching the game 6 times.