As I mentioned before, it's probably worth deleting your Google account completely (
https://support.google.com/accounts/answer/32046?hl=en) and setting up a completely new one, making sure you use 2-factor authentication (and use the Google Authenticator app, not SMS as the 2-factor method), with a strong password that can't be easily guessed (i.e., it doesn't have any obvious meaning, like a birthday or a pet's name, etc.).
If you use any social media, stop sharing your life on it -- that's the easiest way for anyone (including unsavory types) to know where you are, what you're doing, and what's going on with your life and family. Also make sure your social media accounts are as secured as possible, much like your Google account.