I've never heard of a clutch going out after only a couple days. It doesn't sound likely unless you are slipping it a lot and just burn it up. But if you are taking it easy there is something else wrong. Something else is going on. Did you replace the pressure plate? If you didn't and the springs are weak or broken thats the likely cause. About breaking in a clutch? Really there is no such thing. As long as you take it easy for a few days. Just normal shifting thats all there is to consider here. When the clutch is engaged there is nothing going on that has anything to do with breaking in anything. The parts are locked together. Just trying to give useful info. Not trying to be disrespectful.