Can I sue someone for hacking my email account(s) to gain personal information without my knowledge. Who knows what other info of mine they have.

Although I am not familiar with California law, most states have criminal statutes prohibiting computer hacking.  If you brought this information to the authorities, they might commence criminal proceedings against her.  As for a civil suit, you may be able to get an injunction against her using any of the information she got from hacking, and ever accessing your email again, but you haven't mentioned any money damages that you have suffered from the hack.  However, it may be (again, you'd have to check California law) that there is an anti-hacking statute in California which provided for the right to recover a certain amount from a hacker even in the absence of actual money damages.