Checking in while DD naps as I've been so rubbish at posting on this thread that it's fallen off my Threads I'm On 
Not much to report; had 16w appt on Tuesday and heard the baby's heartbeat. I had to ask though, and she said it was quite early but she'd try. Took a while to find it as the baby is still way down low. Got 20w scan in 5 weeks, then 25w appt after that. In the meantime I've got a long weekend in New York, a holiday with ILs in Montenegro and Croatia and a trip to see my parents in Edinburgh. All in May!
Bear the '40w from last period' relies on you having a 28-day cycle, which isn't always the case. So starting from conception-minus-two-weeks might be more accurate. But there's also the fact that sperm can survive up to 7 (I think) days, so conception date isn't necessarily the day you, ahem, do the deed, it could be a good few days later. I went by the EDD I was given at the scan as my periods had been very irregular since coming off the pill (both in my last pregnancy and this one).