I'm definitely achey and not sleeping well either, although a week of night shifts isn't helping. Pre-natal Pilates has been really good for keeping my back healthy though.
We have a total social media blackout about children, no photos, no news, not even our DD's name gets mentioned. All my friends respect it, but my SIL doesn't get it and occasionally posts photos and birthday wishes, I try to ignore it.
Given our history we told a few people within a few days of finding out about the pregnancy because we knew from experience that we would need support if anything went wrong. Told a few more people after the 12 week scan, but have only started to admit it to colleagues and acquaintances since we had a reassuring 19 week scan this week. I'm still squeezing into (extremely uncomfortable) ordinary clothes to stop people noticing the bump (it just looks like I've eaten too many pies), but looking forward to digging the maternity leggings out of the attic at the weekend! After that it will inevitably be open season on the intrusive questions.
Finally feeling lots of kicks, can't wait for DH and DD to feel them too.