I have been nauseous off and on for almost two months, sometimes it's right when I wake up, other times it doesn't happen until I've been awake and active for a little while. I've taken urine hcg tests and all of them turn out negative, I have frequently become late with my monthly cycle anywhere from 7-11 days late. I'm not sure if this is something I need to go to the doctor for. Often it goes away on its own, but other times it will stay throughout a couple hours in the day.