What is this fear? Is it claustrophobia?

Summer of 2009, the dentist broke my jaw during a wisdom tooth extraction. I had wires and hooks in my mouth for 6 weeks and could not breathe very well. After they took all the stuff out of my mouth, school was just about ready to start. However, I felt SO uncomfortable sitting in a clroom. I was antsy and impatient and I was fidgeting and just wanted to get out of there. Cles were only 15 min. long each. After the 2nd cl ended, I walked to my 3rd period cl, sat down, and could not take it. I was feeling fidgety like before, but I also felt like I needed to gag. My stomach felt perfectly fine, but it felt like something in my throat needed to come up.. but nothing ever did. So, I asked to go to the nurse. He let me and the nurse let me go home. After that, I was homeschooled. I also began to notice that i felt uncomfortable in cars, elevators, etc. So, I thought that I had become claustrophobic after breaking my jaw. But, that feeling that I have in schools, is that claustrophobia or something else? Also, because of me not being able to go to public school, I have not taken my SATs or ACTs yet.. but I don't want to pay for it and study really hard for it, then bail at the last second when i feel claustrophobic when i arrive at the school... What should i do??