haleyfx I'm no midwife but I'm not so sure about your HCG. According to Dr Google HCG at 5 wks is 18-7340, and 6wks would be 1080-56500. I interpreted my result of 2670 last week as being a 5wk-er.. but then I have measured at 5wks 3d today so what do I know 
I would say it's quite possible you've fudged your dates and it's a bit early. I understand that it's normal to see the sack at 5wks and it's very rare to see the heartbeat 6wks+? In any case you'll find out soon. I'm sorry you've got this strife again, you of all people deserve a lovely worry-free pregnancy.
TinyPaws oh gosh IVF tww! How many days in are you? I wish you all the luck in the world.
Boboelephant thank you. It's so early we're definitely be holding our breath for a long time to come. Last natural cycle sounds intriguing, I hope you get one of those sod's law conceptions after IVF is arranged
! A potentially lovely start to the New Year, I really hope it works for you. Is there any prep you have to do?
Justincase87 Christmas tree sounds ace. I know how you feel about the work pressure, but really, every workplace is set up to cope with sickness and no one thanks you for limping in! I wish I could take my own advice though! I'd definitely shaft all responsibilities until your re-scan, you've got a solid gold excuse 
MeghanV07 I wouldn't worry about cm. I think it's common to get loads of it.