Before anyone suggests it - I changed my password as soon as I thought something fishy was going on.
When I logged out 6-7 hours ago I had almost 8,000 currants. I know, its not a lot so I'm not torn to pieces or anything. When I sat back down to my computer I was showing 4 currants and I had 5 messages in my mailbox for auction house items I didn't purchase. The purchase times on them were during the hours I wasn't playing. No one has access to my pc (I rarely leave the room it's in) and my passwords are unusual and hard to guess. I don't know if this was an account compromise (I dont have zip on my account as I'm lower level and the AH items are available to me so I can just use or resell) or just some weird incident with the AH, but change your passwords frequently!