I've been feeling nauseas on and off for the past week, then during the weekend I felt ok or I didn't notice it. Its Monday now and these nauseas feelings are coming back. I would get headaches along with them sometimes too, I'm not sure if it's related. Could this be a pregnancy symptom? Have I been coming down with something for this long? Could it be stress or lack of sleep? I could really use some input please on what the problem could be and what I could do to help make it stop.