More Macbook problems

[الله أكبر]

Alright, this is starting to piss me off.  Finder just had some problems...couldn't go into Spaces with the F3 key, Dock wouldn't come up, and couldn't Command+Tab.  I had been told by a friend to Force-Relaunch Finder if this happens, so I did, but to no avail.  This isn't the first time that this happened...do I need to get my comp checked out or something?  That and the problem I had the other day are starting to worry me...