whenever i go outside of my house, i suddenly feel shortness of breath and everything around me seems so overwhelming and my senses are “heightened” like the brightness, everything seems so blurry and very loud. when i wait for the bus at the bus stop, my whole body feels like it’s swaying backwards and forwards and i feel dizzy to the point where i feel like i need to sit down incase i fall over. i was sat in the front row of class once and felt like everyone was looking at me so my whole body again felt like i was going to collapse like i was about to fall off my desk so i had to hold onto the corner of the table the whole lesson. 

does this sound like anxiety or a medical condition?