I got my 4th beta back and am not sure what to think of these numbers. The nurse keeps telling me they're excellent, but I can't help noticing that the doubling time keeps slowing down.
14dpo: 91
16dpo: 231 (35 hours)
18dpo: 409 (58 hours)
21dpo: 849 (68 hours)
Supposedly once you're around 1200 it's supposed to slow down but this seems too early. They scheduled an ultrasound for Thursday so maybe I'll have an idea what's going on then but ugh, this is so frustrating!