No complications.
Apparantly its a very common type of MC - when the egg and sperm are doing the work something is missed (sorry for the non technical talk)its as simple as that, just a fault in the initial making.
For all intensive purposes your body believes its pregnant and hence the sac just grows and grows, im not sure how long it would have gone on for had i not have had the D&C.
I found this really difficult as i believed that i had had a baby in there for 9 weeks and felt silly/stupid that there actually never was one, i was nauseous and had sore boobs all the usual symptoms but no baby. Im now pregnant again and have just gone past the dreaded 9 wk mark, I still dont believe that this pregnancy is viable even tho ive had a scan and all seemed well, im only too aware how easily nature takes over and things go wrong.
I really think if you have concerns that you have to speak to your GP or aftercare provider (EPAU, Midwife), its not acceptable to leave you waiting with bated breath and full of anxiety about your future. if you want a D&C bloody well demand one, you are entitled and dont letthem forget that.
I hope everything works out for you im sure you will be fine, remember that this DOESNT mean you wont go on to have a perfectly healtht pregnancy next time.
Even the best cake bakers sometimes get it wrong, this is what has happened to you, maybe one ingredient was missed, it really is as cut and dry as that (although not emotionally as i very well know) i just want you to be assured theres nothing wrong with you it really is one of those things.
(((( Loadsa love and hugs )))