clutch problem Options

[1995st204]

The other day i left my house and my car was driving fine. A few minutes into driving my clutch started acting funny. When i push in the clutch pedal it sort of vibrates and does the same when you release it. When this would happen i couldnt put my car in gear. After a few minutes it would stop and the later it would start again. Now it is completely messed up. I have a mechanic friend and he said to change the master and slave cylinder. I did that and still had the same results. I bled the clutch alot and got it to start working for a while then it messed up again. Has any one had this problem before. Is there a trick to bleeding it other than the normal bleeding procedures. Please help me out.