Everything sounds very good. Don't be concerned. Totally normal. You are doing very good work. There will probably always be feelings of energy for you, but your perspective will change, some of the initial feelings will tone down, or assimulate, as Margaret mentioned in another post. As blockages open, you will feel qi in places for the first time, then nothing. You will most likely always feel the warmth in your hands and feet, when you practice, or whenever. Maybe the lower dan tien too. There is a major energy point on each palm, and on the bottom of each foot. Remember too, that meridians of points connect throughout your body. Blockages opening in one place can be felt in other places too, because of how these channels are connected. Relax, it all sounds very good for you.