Clutch Problem

Ok last night my clutch started acting very weird. Then I noticed the pedal got a little lighter and I can could hear the flywheel slapping a bit, then I had trouble getting it in and out of gear and then I thought it was going in reverse period and right as I take off the clutch would grind, thing is it doesn't do it all the time, me and a friend believe its the slave cynlinder which makes a lot of sense because it didn't do it at all today.
I want too know if I should get another factory slave or shop around for a performance one? I believe the factory ones also had a drill mod that you could do to help the slave get more fluid through it to help prevent missing gears at high rpm shifts. Any help, advice, thoughts on this is grateful, thank you.

Bump, I really need some info on this by tomorrow if possible. If I got to replace the slave, then I would like an idea of some performance slaves I could buy

flush and bleed your system first before tearing your slave off.