Dusty~ Its hard not to worry when you have already had things go wrong in the past.Me too! I worry all the time and am forever checking to see that my symptoms are still 'there'.I havent hardly had any sickness and my boobs are sore but not as sore as they get before a period.They tend to hurt,first thing when i get up then late at night but not really through the day. I only feel slightly nautious when i smell something and the only 2 strong symptoms i have is extreme tiredness and constant trips to the loo.
I had my first scan last tuesday and had a lovely heartbeat with a good size bub and my ivf specialist said that when a heartbeat is found,your 90% off the way there so the mc rate is only 10%.Thats pretty good,i think.My new pregnancy book i just bought says,however that if your 8 weeks and a heartbeat has been found the chance of a baby at the end of your pregnancy is a massive 97%.
Try not to stress.You probably felt reassured by the scan and didnt think of the symptoms so much,until now,your thinking about it again and starting to worry until the reassurance of the next scan.I felt great about my scan and only 3 days later have started wishing for the next scan in a few weeks to hurry up,so i can be reassured again!

Hope you take it easy.I didnt have any symptoms when i had my son 12 yrs ago.I even had bleeding for 2 weeks so i didnt know i was pg until about 8 weeks.