Is Glow accurate?

Kimberlee • Mama x3 | 30 | Married ❤️

Okay, so my LMP was January 18th. Lasted about 4 or 5 days. I got a positive ovulation test on February 1st. Glow says that I'm 4 weeks & 6 days pregnant. I don't see how that is possible because I hadn't even started my period then.

My midwife suggested getting my HCG levels done since I miscarried late last year. My HCG level tested at 71 today which would be low for almost 5 weeks along. But my progesterone was awesome. I just don't think I'm as far along as Glow says. I'm trying not to worry. Can anyone help?