Got my '12 week' scan appointment on the 26th Feb, from my last period this would make me 15 weeks and 2 days, but because I had an early scan they said on that date I will be between 12 weeks 5days and 13 weeks 5 days at this early scan they only estimated the baby's size they wasn't certain , I'm slightly worried because I've heard babys growth can speed up and what if baby's measuring ahead then they will not be able to do the combined test! My friend had an early scan and they still stuck with her Last period incase the dates were wrong.. I've had anxiety all day because I had scans with my 2nd child she was measuring 10 days smaller then at my 12 wk scan she was measuring 11 days ahead! Am I overthinking 