multiple attempts were made to log into my account
If you have the interest and resources to pursue this, it is a felony in most states to log into someone's e-mail account without permission, and an attempted felony to attempt to do so. People have been prosecuted for this kind of thing.
http://www.volokh.com/2010/12/27/man-prosecuted-for-reading-wifes-e-mail-without-her-authorization/
http://communications-media.lawyers.com/privacy-law/Email-Hacking-Is-A-Serious-Crime.html