Hi, I'm a 21 year old female and have recently seen a cardiologist for a rapid irregular heartbeat and dizziness during exercise and emotional stress this has been happening since I was 16 but has only had 5 times, the cardiologist took an ecg and the he told me all was absolutely fine but a QT interval of 508ms, he did make me wear a holter moniter after this but he did not tell me the results, does this mean it was ok? he didn't seem concerned and told me to come back in 1 year. I was so frightened I went to my own doctor who did not seem to know much about the condition but he referred me to another cardiologist anyways but that appointment is not until 2 months! I'm so scared in have a cardiac arrest in the meantime! I live on my own so it's even worse. I have my self a panic attack thinking about it and I freaked out because I thought my heart would go in that weird rhythm because I felt a really big thud in my chest. Any advice would be great! Thank you.