thanks for sharing your problem.
is nothing but duration of sleep is less in this case.
sometimes any kind of stress
may cause this,or any pain or discomfort as you have mentioned.
i think after removal of the cause your problem will reduce,if there is no underlying pathology.
you have tongue biting habit during sleep.this is dangerous,definately you should visit your orthodontist for a suitable appliance which would be of fixed type.
stress seems to be causative factor here also.so please try and relax.hope it helps. thanks.