I kinda hope you are, because backup and source control really should be separate functions. Obviously your source control repository should be backed up, and pushing stuff into it acts to create a backup, but you really should have a separate backup system at work as well, to cover unpushed code as well as all the other useful info contained on your computer.

I use it the same way too. I do not really see why backup should be separate from source control as there is no valuable information on my (work) computer apart from the source code, and I never spend more than a few hours without pushing.

Backups of your work computer would close that hours-long window between pushes.

You are not