Re: fast moving, we had been together for nearly a year at the point we decided to get engaged. Still quite quick by my book but we've been through hell with dh's health, it's been a major test for us (and more to come, I have no doubt!).
The pregnancy did happen v quickly though - came off the pill one month, pregnant the next. My secret - and this is not really applicable to all! - was to return to the project I'd been working on in Sweden. In the last two years I think around 15 babies have been born to people on the project, there's definitely something in the water! Well, I was actually just pregnant when I went back so maybe not the water, just the thought of the project was enough.
Funny that so many of the June scans are showing boys - dh is convinced I'm carrying a boy as well, so I can't even buck the trend by announcing a girl in a few weeks' time. (Probably). In two minds about it - I would probably prefer a girl, but the MIL has "one of her feelings" that it is a girl, which instantly makes me want it to be a boy just to prove her wrong . Ultimately I'm quite happy with either, of course, time will tell! So far of my parents' grandchildren, it's gone strictly in girl-boy-girl-boy order by age, my youngest nephew even miraculously turned from a girl to a boy just before birth to accommodate the arrival of the little girl my brother adopted this time last year (not the same brother who was father to this nephew, I should stress). She arrived in the family on 31 Jan, the littlest boy was born 2 days later. If she had waited a week, he would have been a girl by rights!
Anyway, I think the pattern is about to fail as my brother is in the process of adopting the younger brother of the little girl, and there's not much chance of him arriving after my baby just to keep the pattern in order. Which means I have no reliable way of predicting what it's going to be - we'll just have to wait and see