Low HCG? 40 @ 16dpo

My beta at 4 weeks was 15...despite days of positive tests 🤷🏼‍♀️

Today at 4 Weeks 2 days (16dpo) I came back at 40, so they’re more than doubling.

My doc has not expressed immediate concern especially since they more than doubled in 48 hours but does recommend continuing to track. My next draw is Friday.

Anyone have experience with this?? The charts and graphs I see indicate this is sooo low for where I’m at and I don’t know what to think!! ❤️ Cautiously optimistic ...

UPDATE: Friday’s third draw at about 45 hours was 119! Saw the doctor today and she was so sweet and supportive. Also have an early ultrasound scheduled for 6 weeks so 🤞🏻