First HCG level!

Caroline
Hi all, due in august too, after 7 months TTC baby #1. Got a blood test at 4 weeks 1day after 1st day of last period and result is 423. My dr confused me by saying it falls in the range of healthy level for 2-3 weeks but not 4-5 weeks. Perhaps she meant 2-3 weeks after conception. What are your levels at around 4 weeks and does mine seem ok?