My name is Brittany and I am 20 years old. For about a month now my teeth have been extremely sensitive, and sometimes they will feel so weird and sensitive that when I touch some of them they make this clicking sound.I really started getting worried when the other day my jaw started hurting. It had hurt a little a few months back and even a year ago I had some discomfort, but this was different. It hurts to chew. It feels like my jaw is popping. I don't want to eat. I don't know what to do. I don't have health or dental insurance. I haven't been to the dentist in ten years. I take really good care of my teeth. I don't know what this is. Please help me.