I think everything turning blurry and your vision fading to black usually means your dream is just losing its stability. Refer to the Dream Stabilization and Clarity Tutorial. Although this tutorial is intended for lucid dreaming, you might be able to learn more about stability from it. Because it is a recurring dream though, it could have something to do with your waking life. Think of any changes in your waking life that might have happened before you started having these dreams. I'm not an expert, but I hope this at least helps a little.