Finding yourself a bit busy now that you've stopped letting work claw its way into your free time? That was to be expected, and what you need to do now is focus on your time management techniques.
Pretty much everyone, no matter how diligent they are, could make some improvements when it comes to saving time. Whether it's a cluttered desk, a chaotic browser bookmark list, or a mosaic of sticky notes, if you streamline your system, you'll definitely save some time and be able to fit more in before 5:00.
If you've tried everything and you're still swimming, however, it might be time to meet with your manager and discuss your workload. Don't feel like a failure, just explain that you were spending too much of your personal time keeping up with work, and you'd appreciate it if your boss would evaluate your workload and consider dialing it back a bit if it's truly excessive. You might be out of luck if your boss isn't so understanding, but it's at least worth a shot.