Frustrated with drs office

So this is my 7th pregnancy(4 miscarriage 2 births) so safe to say not my first walk around the block, I went to my first pregnancy appointment today and they did blood work and the nurse called me and said “positive but low, levels according to my chart say 4 weeks 3 days” here are my issues:

*note: I’m 5 weeks 4 days, I tracked ovulation and everything*

1. I have NEVER seen a chart have days in it just weeks

2. EVERY single chart I have seen I am well within normal range for 5 weeks(19-7,340) mine was 803. I’ll be 6 weeks on Thursday and normal for 6 weeks is 1,080-65,500 and I’ll be 1606+ by then? So I don’t see the problem???

3. They want to wait a WEEK to re-check when it’s supposed to be every 2-3 days.

4. They want my levels over 10,000 to do an ultrasound? I’ve never had an HCG “requirement” before?(I don’t mind waiting till however many weeks but an HCG requirement seems odd?)

5. My levels are NOT “low” from literally the 15 different accredited website charts I’ve looked at, so why would the nurse say that??

Just looking for reassurance I guess.I’m frustrated with the whole appointment and the nurse for saying that, especially since the numbers seem good?