2001 Daewoo Nubira clutch/transmission problem?

MY Nubira recently started slipping a bit.

I have the manual 5 speed and it goes in and out of gear just fine.

However, if I step on the accelerator more then slightly it starts to slip for a few seconds then catches and goes unless I push even harder in which case it slips out then goes again etc.

Id does this in every forward gear but not reverse.

I think but am not positive that it is a problem with the pressure plate on the clutch what do you think?

Also does my maek and model have a clutch that can be adjusted?

And lastly what can I expect to fix this problem?