Should I be worried?

Please read this:

........all of the content in the file is available in Google's index without any passwords. In the case of the password file, searching on "password" will probably yield a hit on the file. You can then read the cached version of the file to see all the contents. Google confirmed that the product is designed to behave in this way. This behavior is surprising, in that even data you enter into a file which already encrypted will be in the index, indicating that Google is capturing it before it is written to disk.....

http://www.pcmag.com/article2/0,1759,1708644,00.asp