clutch problem.....??
 

I just noticed yesterday that thers something wrong with my tranny or so...When I take off (normal take off),in first gear my car jerks a little ,I mean it shakes .Just like the clutch is hesitating to stick .It wont slip corectly like before . But the wierd thing is my car is a 2002 and i have never felt my clutch slip or so .So what could be my problem ? My car have 160 000km.