Time stop

I’m in class trying to focus and my mind continues on an impulsive loop. Obsessive and unobtrusive hypotheticals fill my mind and I try to breathe through it and fail until I realize my sight is blurred and I havent been breathing at all. I start to feel nauseous and dizzy and tell myself I cannot have a panic attack or faint in class. That would be way to embarrassing and my subject of panic is only hypothetical which makes it even worst. My vision becomes laser and I think I have to get up and go to the bathroom before I pass out but I’m too scared I will fall before I get there so I choose to stay in my seat. Everything goes quiet around me and I focus on breathing and nothing more. My heart begins to slow down and my breathing becomes more regulated. The instructors voice comes back as a whisper then actual volume. I refocus and begin to take notes.