My 7yr old complains of chest pain occasionally. About two weeks ago, he panicked while we were driving and his lips were turning blue. I was on the expressway and could not stop very quickly. I was able to talk him into calming down and breathing normally, the chest pain subsided after a few more minutes. Last week he complained of chest pain and said he was tired Nd had to sit down, he was also holding his left shoulder. He is very pale with dark circles under his eyes. I ve been told the dark circles are result of vitamin D deficiency.