An ekg showed a prolonged qt interval and it typed that i may be low in calcium. blood work came back fine. he didn't seemed concerned, should i be?

Ask some questions.: A lot of EKG machines do automatic interpretations. I think they over read and report issues that aren't there or aren't significant. Prolonged QT can be a clinically significant finding but there are some ifs. It can be seen if you are on certain medications. It is a normal finding in certain percentage of the population. Clearly, you are concerned. Call your doctor and ask for clarification