Princess,
I had terrible nausea until about the 10 week mark and due to my history I was certain I had lost my baby. So certain in fact that I went into Casualty told them my history and they had me in for a scan in about half an hour. Pinchy was there waving and moving around! I was floored as I was so certain it was gone. Lots of women have days where they feel quite normal so try not to stress too much. Speak to your GP if you are really worried. Your bloods for the NT measure b-HCG so that would pick up if there was a prob anyway. You could maybe get a rush on the bloods or ask your doc for a scan? I'lll be thinking of you.
Hope xoxo