rainman

so I just had my clutch replaced about 2 or 3 weeks ago as well as the slave, but not my master cylinder, which is bad. so for about a week or so, when I tried to accelerate lightly in 5th or 6th gear the RPM's jumped up a little, kind of like the tires were spinning a little, then grabbed. now it's doing it in all gears, but worse. I can't accelerate at all really in 6th, just cruise. i can accelerate lightly in other gears, but if I get on it at all the rpm's jump up to about 4000. what's going on, could it be something with my master(fingers crossed), or is something wrong with the clutch or flywheel?