My car is a standard, and recently when I drove it on the highway, whenever I gave it gas, especially in the higher gears, that the car would hardly accelerate, and the rpms would rev high, almost as if if was in neutral. It took some work to get the car to just 70 mph. I've noticed since then in the past week or so, that its doing it worse in the lower gears too, and its stressful just driving it around town. I have to accelerate fairly slowly. Is this the clutch going out? If so, whats the general consensus on a repair/replacement?