Everytime im slowing down by downshifting gears my whole car shakes as im letting go of the clutch... and when holding your foot on the clutch pedal you can feel it vibrate alot. anyone know what to do to fix this??
Sounds like you may have broke an engine mount. The fact that it vibrates all the time, clutch in or out, means it may not be something specifically with your clutch. How old is the clutch? It could also be clutch chatter from it being worn badly or warped. If the clutch is over 60k miles, it may need replacing. If its an engine or tranny mount, it should be visible unless its the dog bone under the IC.
If its only happening when you are releasing the clutch, its possible that the throwout bearing is messed up or the clutch fork. If you remove the boot around the clutch fork, you can peer inside with a flashlight and see your throwout bearing and fork. There should be a tab holding it in. The boot is underneath your IC. Has it been happening for the entire 10k miles since you had it installed?