Ok so i have a big problem with anxiety but don't know if this is the anxiety i feel it even when im not anxious i feel like i cant breathe and i feel like when i breathe with my mouth it comes to much air and when im laughing it feels like my lungs are dying i feel like im passing out so i try not to laugh anymore this began maybe 20 days or so at first it only came sometimes but i didnt feel it so much but now it feels almost all the time please help i am so scared that my whole body is shaking also sometimes it feels like my chest/lungs just removes all the air