hello, I am mathew, I m 13 years old and just got back from a dentist appointment. During the appointment I found it hard to breathe. I am back at my house now and I still find it hard to breathe, but have noticed more odd symptoms. My chest is hurting, saliva is building up very fast in my mouth I fell like I have t throw up, and my throat hurts quite a lot. I also constantly burp. Do you know what is going on, it is slowly feeling worse