Lately Ive been getting these weird feelings and the best way to describe them is Sometimes i'll either be sitting there or layin down and my heart will kinda race and it feels like a thing full of air fills my brain quick and i almost wanna just close my eyes and pass out (sorry best way to describe it) i have no clue what this is and it gets me so worried..last night i couldnt fall asleep cause it happened alot. And when i was almost asleep it did and i jumped! any clue as to what it possibly could be?