UPON RISING FROM A LAYING OR SITTING POSITION, BOTH EARS CLOG UP AND I CAN HEAR THE BLOOD SWOOSHING. THEY CLEAR IN A MOMENT OR TWO, BUT IT'S AS IF I REACH A HIGH ALTITUDE SUDDENLY. WHAT CAN THIS BE? MY HEART IS ALSO SEEMING TO WORK VERY HARD LATELY WITH LITTLE EFFORT. LAST YEAR I WAS TOTALLY CHECKED OUT BECAUSE OF CONSTANT CHEST PAINS WHICH ARE BACK. I HAD A THALIUM STRESS TEST AND EVEN A CARDIAC CATH WHICH CLEARED ME TOTALLY. I AM ON MEDS FOR SLIGHT TACHYCARDIA. ANY SUGGESTIONS? THIS IS REALLY FRIGHTENING ME THE WAY I AM SO OUT OF BREATH, THE EAR THING AND THE HEART WORKING SO HARD AT A NORMAL RATE.