Luckily, there's an easy way to see exactly what Google knows about where you've been, and you can even see a map of past locations you have visited.
This all depends on whether you have enabled two settings tied to your Google account: location reporting and location history. Of course Google lets you turn these settings off at any time, and it even offers step-by-step instructions.
But you're interested in seeing what has already been recorded.
First, sign in to whichever Gmail or Google account you use the most.
Then head on over to this little-known Google Maps website, where you'll be greeted by a screen like this.