Hi, i was admitted to accident and emergency Friday morning with stabbing pains in the chest. And ECG showed nothing abnormal however they refused to do blood samples, they say it was not a cardiac event. I don't know how they know this. I am 20 years old, female, and within a normal bmi. I'm worried they aren't taking this seriously enough at my GP though, as i have been several times over the last few years, and these pains are often accompanied by dizziness, and once by loss of conciousness. My father died aged 34 of cyanotic congenital heart disease, cardiac arrest and anoxic brain injury. What things should i ask from my gp? Should i be worried?