Hope you guys don't mind if I join your thread.
Hi CC81. I am in a similar position to you, had a mmc in May and now pregnant again. Only 4w2d and I think the stress I am feeling is beyond anything I have ever experienced, and it can't be good for me or the baby. Had light brown spotting yesterday and a few days before that, which is making things worse.
Anyway, I understand your irrational fears. The only thing that is helping me is that I just keep repeating "my baby will be fine". Not sure what else I can do!
I wish someone could knock me out and wake me up after the first trimester!