why do i keep feeling the need to shake and fidget my arms and legs? Or push all the air out of my lungs really fast through my nose? then sometimes ill stop breathing for a sec and its almost like i do it purposely but i dont at the same time. But ill stop breathing for a sec and its hard to describe but its almost like i make everything inside my chest "shake" its almost like a short adrenaline rush. i always feel the need to do it and when i do i dont want to do it but if i dont its very aggravating if i dont.