[Glasgow 911SC]

Today I wa sout driving. I accelerated from 2nd to 3rd and CRUNCH! I stopped at the side of the road with the engine running fine. Now when I put it in gear and try to accelerate all I get is a crunching noise. No pull at all. The clutch pedal just feels as before as does the shifter. I have no idea where to start looking. I've got a horrible feeling this is going to cost £££/$$$.

Any help would be outstanding.
Must be because I was talking of replacing it!