Detect when player is holding attack key

Hi,

I have created a weapon with auto attack ability. When player holds attack key (left mouse button), the weapon automatically attacks as fast as possible, so no spamming is needed. I am using mouse event, that triggers whever the button is pressed or released and it works fine. However, the problem is when player pauses the game when auto-attacking. Then the game doesn't recognise, that the button was released and auto attack contiunes untill it's pressed and realsed again. Is there any simple way to solve this problem?