Belinda,
I also freaked out when my nausea diminshed at about the 9 week mark but bubs was still there at 10 weeks doing all the right things. Can you move your scan forward?? You should be able to have your first tri screening done anywhere from 11 and a half weeks to 13 and a half weeks. See if you can go at the end of next week some time. I'm going in on Wednesday and I'll be 11 weeks and 5 days, my ob.s actually wanted me in between 11 and 12 weeks.
Just try and enjoy feeling like a human again and if you need to go and see your doc. Hope you feel better soon-- I have an unfortunate history and I know what it's like to feel anxious. BUT it doesn't help and you need to try and have faith-- it is out of our hands anyway!