This is probably a really stupid question......

I haven't had much more than occasional waves of nausea so far through out my 9 weeks of pregnancy, and usually I feel relatively normal. Well this morning I went to work after having a very healthy, balanced breakfast and drinking lots of water, and for three straight hours, every time I would stand up I would get so sick to my stomach and so light headed to the point where I was starting to get tunnel vision and would have to run to the bathroom cause I thought I was going to throw up or pass out or both. It was the strangest thing!! Does that sound like morning sickness that I've just haven't experienced yet, or something else??