I have six upper teeth starting from the front to the back ,have no feeling at all. Feels just like i had shots to numb them. But have not been to the dentistry in over a year. what causes this? I do get a headache after a few hours waking up in the morning. I also feel tired. My teeth on the right upper side also seen heavy. I don't see anything when i look at my gums or teeth. Can anyone help.? ty