It is dfinitely your clutch. I've always felt that, if you have to replace it, you might as well upgrade it and not ever have to worry about it. Spend some extra cash on a good performance clutch like ACT, ClutchMasters, Fidanza, or Centerforce. They simply last longer and grip better.
I have the Centerforce Dual Friction competitio kit which includes the clutch disk, pressure plate, throwout bearing and pilot bearing. Retails for $500, I paid $175 on an ebay auction simply because it had damaged packaging.