NBC Connecticut, Hatton recounted what his 17-year-old son Gregory went through post-vaccination. She said that Gregory started complaining of severe chest pain three days after getting the second dose. He felt worse on the fourth day and started to experience back pain as well. He then went to a walk-in clinic and found that he has pericarditis, or the inflammation of the lining outside the heart. He was then sent to two different hospitals as healthcare workers scrambled to identify the cause of his condition. “They hooked him up to a heart monitor, did more EKGs (electrocardiograms), echocardiograms,” Hatton said.