Actually thinking back i wasn't worried before the first scan. I was very excited and impatient. Anxious (after my betas) to know how many. I never once thought that I would miscarry...which is odd for me to be so optimistic after having abruptly stopped my Zoloft for anxiety/depression. I was more worried about the second one... Id already fallen in love with my "blobs" and I was horrified baby B wasn't going to make it because his heartbeat was so much weaker... Doc even set us up to expect the whole "vanishing twin"...turned out it was just too early. My RE humored me by doing a scan just a week 1/2 later and that put my mind at ease bc they were both strong! Everything now is fine and I have no worries. I have 2 strong little nuggets in my belly that are sucking all of my nutrients and energy from me! Lol... And I wouldn't have it any other way!
Worrying is pointless.... If something bad is going to happen, worrying wont prevent it. When women miscarry, it's Gods way of saying that something isn't right, and as sad and heartbreaking as it is and as it can be, it's for the better. A miscarriage is generally due to a genetic abnormality that would have harmed the baby in the long run. I guess when you accept that, and understand nature's way of natural selection... It's easier to not worry as much.
Sorry if that seems like a rant, but it gives me peace of mind when I start to get anxious or scared.