When im in school at lessons or even on breaks i can feel something in the lower part of my throat. The feeling often emerges whenever i sit down in classes, prolonged times of sitting (not at home) and whenever i become aware of the feeling, when i do i usually start swallow to get rid of it resulting in the feeling getting worse. It has lately forced me to leave classes for water and skip lunch entirely due to the fact that i cant think of food because it causes me to start feeling the pressure/nausea. Note that all of these things happens at school