Hi Cassie

I dont know if it is unusual but the only reason why i had an earlier scan was because i had some bleeding. Otherwise my first scan would be the one coming up in the next few weeks (14 weeks-ish) after i have my first antenatal (this friday, 13 weeks) The reason for the delay for me is that where i live there are lots of pregnant ladies and so there is a longer waiting period (im public). Have you had an appointment with your GP & have they given you a referal for your antenatal? If you're like me and are having a later first antenatal appointment then you will probably find out when your first ultrasound is then.
The other reason i know of for an earlier scan is if you are at a higher risk for abnormalities and need to have a NT Scan. I didnt, so my second (which really should be my first) will be around 14-15wks. Have i confused you as much as ive confused myself??? sorry!
I might have more to say (and a more knowledgable answer after my first antenatal!)