I was wondering if anyone knew a specific name for whatever I experience that is somewhat related to being closed in, but isn't claustrophobia?
It's more so the feeling I get of not being able to breath, usually occurring within a small, closed space. My face gets hot, my heart starts to pump faster, and I have shortness of breath.

This sometimes can just occur when my face is too close to a wall and not in the open when I'm trying to sleep.