Starting approximately two months ago I developed a crackling sound during breathing. The sound is not noticeable when I am upright. It is most pronounced when I am laying down on my right side, much less noticeable when I am on my back, and practically non-existent when I lay on my stomach. If I breath in deeply or quickly the sound is not noticeable. It is only during normal or shallow breathing. At the end of the exhale I can also hear a wheeze or whistling sound. Also the crackling feels as though it is coming from somewhere between my throat and my lungs. There is also a bubbling sensation associated with the sound that feels like it is coming from below my throat somewhere.