to DV. I often have "rewind" experiences, but I'm usually not lucid. I just wonder if I had done something different if something else would have happened and then the dream does it for me.

When I'm lucid I never rewind anything, I just move forward.

That feeling in your stomach is just mental imagery left over from the dream. Most of the people here have occasional experiences when they wake up and see something in their room from their dreams. It is because the dream centre of the brain is still on. Yours is just manifesting itself in a internal feeling than a visual image.

Have fun exploring DV and your dream world. If you're interested in having lucid dreams on demand check out the tutorials on WBTB and WILDs.