Badmethod

Hi I did some searching here and couldn't find any real answers to the above question so I am sorry if this has been asked before. In FPS mode my mouse swings wildly no matter what I set it to. It starts off normally but if i need to turn quickly I end up doing 360's all over the place. Sure makes it hard to aim accurately that's for sure. I tried turning off post process and lowering details etc with no positive result. I noticed lot of folks are having this issue and it is really ruining the game for me. Does anyone know if this is going to be patched at some point or if there is a command or .ini file I can edit please? Any help appreciated and again, sorry if this has been asked here before.