My son is almost 17, athletic build, complaining of intense chest pain. Off and on for about a month and is starting to increase in frequency and strength. Last week he had pain on one side of his face with it. Today he was producing a lot of saliva with it like when you are nauseated. He has a hx of activity induced asthma, joint/muscular pain, white spots over his upper body, welts upon touch (dermographism). Could this be lupus? or do you know what it is?