I do believe in God, so take the following with a grain of salt, but I'll try to say this in the most unbiased way I can muster.

Even if you are non-religious and do not believe in a deity, the "god" in your dream does not necessarily have to be the God, or gods. It could simply be a symbol of a "higher consciousness" in yourself, sort of like your inner voice of reason telling you how to improve your life and sense of well-being. I agree with the others, regardless of where the message is coming from, I think you should follow it. Also, I think you should look into your religious beliefs a bit more. I'm not saying that you shouldn't be an atheist, but I've noticed that a lot of atheists compare God to a unicorn, i.e. a fictional, mythical being. So, would it confuse you as much to dream about a unicorn as it would to dream about God? Did you feel shaken up, sad, or guilty after the dream? I think it's worth thinking more about.