Soo , I have a wierd thing going on right now.. I have had my blood work taken for my HCG levels and by them it says that I am about 9weeks ... but my doctor called me the other day because I was wanting to book my disorder ultrasound for like down syndrome and stuff at 12weeks.. well... they told me they are gonna tentivly book it in right now until my dating ultrasound because from my last period I would be 13weeks already 🥺

Has anyone had there hcg bloodwork wrong ? And told they were father along then they were?