You could be further along than the Dr initially thought not abnormal at all
6 weeks 3 days is how much the baby is measuring..
my last period was 6 weeks 5 days and it was a very abnormal period.. just brown blood for 2 days then got heavy then stopped.
2 different men I had seen in the space of 2ish weeks .. I thought the baby was my partners till I seen I was 2 weeks ahead ..
What are you basing 4 weeks off of?
4 weeks since last period? 4 weeks since ovulation? 4 weeks since...?