Possibly a master cylinder issue but...I had a similar problem after my chassis was changed out; turned out that the earlier cars had a clutch over travel stop on the pedal box and the later ones had it in with the clutch. When the chassis was changed, a new pedal box was fitted to suit it which left me without an over travel stop and it was then only a matter of time before the clutch failed with the sort of symptoms you describe. Might need some detective work to suss out which parts you do or do not have fitted to yours but if it has only done 2000 miles and this is the problem then it would have been a problem fitted at the factory.
Best of luck with it.
