Comment by cletus

I'm sorry for the trouble you're having. I have on idea of what's happened and why but thought it timely to point out for the benefit of those reading this thread:

I highly suggest you use two-factor authentication with GMail:

http://googleblog.blogspot.com/2011/02/advanced-sign-in-secu...

Or Jeff Atwood's post on this:

http://www.codinghorror.com/blog/2012/04/make-your-email-hac...

Your email is too valuable to be left open to attack, hijacking or theft.