Crunching when changing gear and car is bouncing as I'm driving along

Everytime I put my foot down on the clutch there's a crunching sound and every now and then I am losing power not totally it's just a little drop when I put my foot on the accelerator and then this week the car has started literally bouncing as I'm driving along I don't know what's shaking it but but it goes through my whole body to the point I can't drive the car now the only way I can try and explain it is it's like a waddle left to right so you're literally shaking in your seat left to right