I'm 27 years old . my heart palpitations but I wore a 24/ monitor an it only happened once that I felt but the machine didn't pick up on it. EKG an bubble test is clear. I had heart surgery when I was 2 born w enlarged heart an hole. So with the spells I've been having I assumed heart related. But so far can't find a problem. My thyroid check out as well 98% good. My spells included hot flashes or chills dizzy tight chested more so first thing in morning but right shoulder pain threw out the day. Anxiouse moody . still having regular periods. This has been going on a year. First six months my limbs or leg would go numb that has stopped. I noticed abt a month bk my breath wore sore as well. What do u think ?????