Wife nauseous w/ food aversions. Crave lean meat, salty food, and choc. No chkn, pork, fish. Headache/Nausea leaves w/ right food. PregTest=No, whats up?

Get her seen. Whenever headache and nausea do not have an obvious cause, it is first necessary to rule disease of the brain in or out. Don't focus on food choices; this is probably not the key. A competent physician needs to work this up.