Kantor on 11 April 2013
I used to get this pretty badly, though not very much anymore as I've grown more used to first-person games. I'm not sure why Infinite in particular would trigger it for you.
As a few tips:
1) Try not to play when you're very tired
2) Drink plenty of water before and during your playtime
3) Increase the FOV as far as it will go.
4) Don't crouch.
(Former) Lead Moderator and (Eternal) VGC Detective 
