You had a complicated pregancy? Were you on bedrest at all?
Yeah - it started at 10 weeks with bleeding and cramping. I was placed on semi-strict bedrest. At 15 weeks, I began gushing torrents and clots of blood, DH rushed me to the ER, where we saw two heartbeats, but they couldn't stop the bleeding. They said there was no hope and they were sorry, and to come back in the morning if I was still bleeding, because I'd probably need a blood transfusion by then, I'd lost so much. DH and I spent the next three days in bed sobbing our eyes out, holding each other, begging the Mother and God and St. John the Wonderworker for intercessions. After 40 hours the bleeding finally slowed down, though I never did go back for that blood transfusion. I guess (subconsciously) if my babies didn't live, I didn't want to either.

I saw my OB the following Monday and he ordered me on full bedrest and to do NOTHING but get up to go to the bathroom. DH had lost his job 4 days before the massive bleed, so he was there to wait on me hand and foot.
I was like that, in bed full time, for 5 months, until mid to late July, when I was 32 or 33 weeks or so. I was going stir crazy and reasoned by then that if they had to take the babies, they'd be okay, plus I hadn't had any further bleeding for a while (which I still did during part of that time in bed). I wasn't running marathons or anything, but I let myself get up and do my hair, etc. The babies were born Aug. 14.
So yeah, I'm a little spooked to TTC again.

I know exactly what you mean about the heart sighs, though - I think about a newborn all the time!!