I had a minor heart attack/myocardial infarction?

Hi, I am a 25 year old male. I have been very fatigued for about a week and having numbness in my left arm and chest pain and shortness of breath. About three days ago I felt like I was going to pass out. I had time to go to a urgent care today and they advised going to the ER. The ER did a EKG and said they think I had a minor heart attack/myocardial infarction. My chest X-ray and cardiac enzymes were normal so they said I am stable now and can return to normal activity but to follow up with a cardiologist. Is this correct or is the EKG just affected by being nervous about being in the ER