Roof of mouth hurts and feels like i cant talk right. i wake up gagging from dry mouth.

Exam: Get to a dentist to get it examined ASAP. Some causes of swelling are more serious than others and a good clinical evaluation is your first step to figuring it out..

See your PCP: Dry mouth can be caused by a number of conditions like medications, nerve damage, systemic disease (diabetes), smoking, etc. See your PCP because the treatment depends on the cause of your dry mouth.