I am a 28-year-old female. For the past few years, I have been having dull chest pain with a heavy left arm, which has been intermittent, but recently it has become more frequent, like two to three times a day, and the pain lasts from 45 minutes to hours. I get palpitations that last for about three to five seconds and hard-pounding heartbeats. I also get sweaty at night. I have had two ECGs, resulting in abnormal inferior and lateral ST depression. A troponin blood test result was 3 ng/mL. My hands and feet are colder than usual, and I often get very tired. I want to know what my results mean and what the problem could be.