I think I'm in big trouble! (committed changes error)

[Rolf Marsh]

This morning, I took my working copy, which is on a flash drive, and 
committed the changes to the hard drive on my desktop.  I then went to 
work, made some more changes to the project on the flash drive (now 
attached to my laptop), and when I wasn't thinking, committed those 
changes.  I assume they went to the laptop?

So, the long and short of it is, I think my flash drive is out of synch 
with the desktop at home.  How do I verify this and fix it?