Just something to consider, a possibility: A lot of your symptoms sound like hiatal hernia. A bad one can put pressure on your spine, affecting nerves elsewhere, which may be what your strange sensations are coming from. And it explains some of the digestive problems, food feeling like it's getting stuck, burping, etc. Hiatal hernia is a great mimicker of many other health problems. Your sleep pattern sound a lot like a friend of mine who was just diagnosed with a very bad hiatal hernia. She had no idea she even had one. Her acid reflux was silent, and her hernia is so bad the pressure on the spine she always thought was her arthritis. Some of the symptoms she was getting had her thinking she was having a heart attack or stroke, but it was just the hernia. And her doctor thinks her sleep problems are also caused by the hernia. When you go see your doctor, you might ask about it.