Chest rattle on one side while resting

I have a very deep chest rattle/vibration sensation in my right lung, deep down by about the middle of the right side of my rib cage while resting. I can be laying down or sitting up, it doesn't matter. It's only when I'm about to fall asleep when this happens, and also when I wake up inthe morning. It never wakes me in the middle of the night, and it isn't painful. I don't have a cough, and I've had several doctors listen to my lungs, and I've also had a chest x ray. Everything looked normal. I'm very worried because obviously I know this isn't normal. I've only had this for the past 6 mos or so. I'm 30 years old, I'm 5'2" and weigh 130 lbs. I'm in great health otherwise. I don't smoke, I do have some cocktails on occasion. Probably about 5-6 a week. I run often, and I don't feel fatigued or short of breath during the day or during exercise. What could this be?

[Kelz72312]

i would deff get a second opp. on this because im not really sure. so i would deff get a second opinion