loss of control

My player seems to have been hijacked! I`m running around enjoying myself when all of a sudden my soldier develops a mind of its own moving forwards and firing. This only happens in bf4, but if i play bf3 immiediatly afterwards the issue comes with me.

       If I boot my pc and play bf3 first on its own its fine and all my other non bf games. I bought a new keypad just in case its some stuck button thing , but no? Also when I come out of the game to desktop I keep getting pinging noises and mouse right click actions. Now this is the weird bit, well weirder actually. If I open google it keeps typing  wwwwsseeeessssss etc. basically its the movement commands from the game as is the mouse selections ie. aim.  

             When I first got the game it ran in ultra great no problems,I think the problems started after a patch..........Help, I feel like I`m haunted :o Doug