I have a question for some of you first time moms!

I have no family dr as he switched to something else last year so I see someone else around my town. Just last week I went and had my first blood test (only for hcg) and it was confirmed I’m pregnant last Friday. I then seen a woman yesterday afternoon who said she thinks I’m about 8 weeks but I think I’m 6 going on 7 weeks tomorrow with the app I’m following (<a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> app that switches to <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy app</a> that I’ve used since last December).

My question is has any of you gotten a call to be asked to go in for another blood test because your hcg levels are low? I know that could Mean possible miscarriage but like I said I believe I’m only 6 going on 7 weeks tomorrow and they won’t go through with a due date ultrasound until I get more blood work. I’m really looking for peace of mind or maybe confirmation that their calculations are possibly wrong and mine are right?