I dont know what im going throught but im having a hard time.. I feel like i cant breathe . im laying down and suddenly i feel like my chest is blocked. I get tired and breathles sometimes when i go uphill. Feel like im losing my balance sometimes. ive done a check up like 2 months ago and everything was perfect i dont know whats happening . Maybe someone can help. Im afraid to go outside and have fun becouse i feel like im gonna fall down in everysecond