Rumbling from clutch pedal

So....

the other day when was quiet I heard a rumbling noise when pulling away or in reverse. It’s on the bite point and if I press the pedal down that little bit further it goes but as I pull away it rumbles as come off the bite point. Also I get a bit a clunk if I come the clutch to quick from 1st to 2nd. The rumbling is only in 1st or reverse it doesn’t happen when on the move. Clutch isn’t slipping but pedal is quite high and I think it’s still the original clutch at 120k. Had a google and lots of people saying flywheel. Indi want over £2000 for clutch kit and flywheel, Audi said 899 for new clutch and will let me know about flywheel when they inspect it. Got a little one on the way so can’t really afford all this so any ideas on what if anything else it could be? I can live with it at the moment but google says can cause further damage if not resolved early?

cheers

matt