Well I had similar problems and was told it could be the through out bearing. I waited for about six months and it got worse. When I took it apart I found that one of the springs inside started to brake out. How hard are you on your clutch? Do you race your car, ex. launching it at the track? If it is the through out bearing your OK to drive on it for a while until you need to replace the clutch. If it gets worse I would take it apart and see.