I AM A 30 Y/O BF Ihave had these chest "spasms",located in the center of my chest for over a year intermittently. Many are so severe that I have to hold my breathe or start coughing to get them to stop. Most recently I have been having dizzy spells several times a day, occassionally near syncopal episodes even while driving. I have gone to the ER and to my private physician several times,nothing found. I have had EKG'S, three CT's and an MRI again nothing. The dizziness has not stoped, i am having a difficult time communicating and concentrating at times, even forgeting how to get home even though it a road frequently traveled. wHAT COULD THIS BE?