I feel blocked in chest in middle of chest or in centre . I feel like something is blocked. Before some days pain was there but now no pain. When I lay down I feel like some what light pressure in middle of chest. And discomfort in left breast like something is blocked but I don't know where What It can be ? Can It be blood clot in lungs or pulmonary embolism ?? Or myocarditis? If I do exercise or long breath is doesn't effect my chest . But when I lay down sometime I feel pressure lite pressure or fullness blocked feelings