Gun is firing without pressing the mouse button

When I start a game Online or Campaign, my gun is on auto-fire. This keeps on happening until all my ammo is gone. It first started when I was playing the Tashgar campaign map. I have tried to repair the game within Origin, didn't fix it. I uninstalled and re-installed the game, didn't fix it. I uninstalled my mouse driver, didn't fix it. I need help with this, its making the game unplayable. 

My computer specs are:

Windows 7.

Intel i5 4670k @ 3.40GHz.

8GB single channel ddr3 @ 798MHz.

Gigabyte Z87X-UD3H-CF.

GeForce GTX 650 Ti BOOST. 

Logitech G5 mouse

Logitech G15 keyboard

Logitech G35 headphones