Thanks everyone - just need Sunday to come about am paranoid about everything! I think a bit of my mucous plug (nice - sorry for tmi) came out today (brownish discharge) - so it may all kick off on its own before then.
Tumtimes, they checked my cervix length as about 10 years ago I had a bit removed for abnormal cells so they always check it if you've had any kind of surgery on it I think. it was an internal scan and they literally just measure it and you go back every 2 weeks or month for another scan to monitor it. Initially they prescribed progesterone which worked as it didn't get any shorter but when I was so allergic to it they said the stitch would be best - was scared of the stitch but so pleased I had it done for extra reassurance (dr Shehata advised against it saying if I'd carried a baby to full term before then I needn't worry - but the cervix looked fine with the first pregnancy, just not on this one).
I think if it looks short at 16 weeks or so (less than 2.5cm I think but can't remember) then there is not much length there for the whole pregnancy as it will get shorter with the weight from the baby so they want to monitor it or strengthen it.
Wow - 2 scans on Tuesday! Am sure all will be fine but completely understand your anxieties, try not to worry and just relax and enjoy seeing your little ones bobbing about on the screen. I know you'll both be fine!
Drttc -are you going to find out what it is?!
I had a different doc do one of my scans there instead of dr S and actually he was lovely and spent so much time doing it and answering all my questions, didn't feel rushed at all so don't worry it may be better than dr s doing it himself!