I have been feeling nauseated for a month now, it usually occurs more after I eat. I have become very very sensitive to smells. I am also experiencing light-headedness randomly during the day. There is no certain movement that causes it, I have experienced it getting up, sitting down, turning around, or just walking. I have also noticed an increase in headaches. I have had a tubal ligation done in 2010, and I have not been late with my menstrual cycle. I do have an appt Wednesday with my PCP. But do you have any ideas what could be going on?