Hi, I am a 60 year old female. During the past month or so, I randomly wake up in the morning very nauseated and most of the time have a headache with the nausea. Each time, I have ended up vomiting. Usually, after that in the next hour or so, the nausea eases off. Today, it will not go away. It isn t like the normal stomach virus in that it goes away for several days and then comes back. What could this be?