Just in the last 2 weeks I have noticed that when I am resting I will find my lips have parted, my teeth have opened slightly and my tongue has pushed past my teeth and is resting against the back of my lips protruding somewhat through. I have had issues with my jaw being tight, sore, clicking and difficult to open without popping for a few years off and on mostly in the morning. I am not sure if this is related to this new symptom. I also have found that I sleep with my mouth open quite a bit lately. In addition, I feel my bite is off as though I have to move my lower jaw backwards more in order to line my molars; though I could just be being hyper sensitive because of all the other issues.