help

I have a wallet with 3.8 coins. The market went above what I got them at a long time ago I stood to make a good amount of money. I went to send the coins to my exchange and sell them only to see the send button grayed out. I then see that there is a little ERROR message, looking at the message (wish I copied and pasted it) it said something about this and that then the error message containing google (it also said transaction request received but ignored due to prefrences) so I closed it, rebooted, then I reset the block chain went to work came home to 0 coins; resetting block chain again and its stuck on connecting. I thought I backed up the wallet (exported keys) but then I realized u prolly just copy and paste it. So any one any ideas? IS there a log I can look in to see what the error was and why I cant access my coins on a damn rally?

error is "com.google.bitcoin.store.BlockStoreException Corrupted block store: could not find chain head: 00000000000000000287e69e4d39c575625a5002424e47b1665edc0c9eddcb6e".