Last night for the first time I practiced deep breathing using the Daoist (sp) method, where you contract the Dan Tien on inhalation and expand it on exhalation, which was REALLY weird. I didn't focus on circulating the energy, just wanted to practice the breathing technique. Anywho, this morning I woke up with what I guess would be heartburn, where I felt somewhat of a burning sensation down in my esophagus. When I drank coffee this morning it was even a little painful when I swallowed, as though it was an acidic type of burn.
Could this be related to what I did last night? If so, is there anything I can do to help the situation because I still have that acidic/burning type feeling a little bit.