Clutch Problem
 

Hey guys whats goin on... i drive a 2006 cobalt ss/sc in yellow and i have a problem with my clutch i was wondering if anyone can solve this problem:thumbsdow
Every time im driving on the highway i'll punch it and go really fast then il strat to slow down and my clutch release point almost touches the floor, i dont know y it does this, but then il start driving again and i have to pump my clutch for like 10 seconds then finally the release point goes back to normal. i was wondering if it has happened to anyone else.
if anyone can figure it out let me know
maybe theres a drill mod that i dont know about. Let me know thanx peace