Hi, I have my 12 week scan tomorrow morning, I will be 12+2 and I'm so nervous! I'm nervous about the outcome and also about what happens during the scan/appointment. On my letter it says it will take about an hour, what do they do in this hour? 
I have already had two scans privately, one at 6 weeks and one at 9+4 weeks and both were fine! Does this increase my chance of things being okay tomorrow? I don't think I've ever been so nervous about something in my life!