Dreaming about programming?

So it's been almost two years since I'm into webdev, and nowadays I'm working on my personal project, and obviously i can't complete the project in a day, so end of the day, there are some problems unresolved. During sleep, I dream about my project's code, finding problems in my code, and I'm irritated because of this, because even though I'm getting 8 hours sleep, still i feel tired after waking up. Is this common? Or do I need to take a break from programming?