Hi,
If you want to increase the security of your account, you might want to consider turning on 2-step verification for your account which you already did. It ensures that no one can EVER "hack" your account without a code from your phone, even if they actually do get your password. Also, the “Recent activity” page shows info about the activity in your Microsoft account, within the last 30 days. This includes any time that you signed in to your account, whether you used a web browser, your phone, an email app, a third-party app or another method.
Hope this helps.