I would appreciate any input regarding my levels, I have had miscarriages back to back and I am a bit worried about this one in regards to my levels, I'm pregnant with twins and I don't have any symptoms which is worrying enough for me, I had an ultrasound yesterday Jan 24th and they said both babies have heartbeats but why is my HCG levels not doubling? Is this normal? My last menstrual period was December 3rd 2021 and I'm currently 7 weeks and 4 days along

HCG 2861 - Progesterone 7 Thursday Jan 6th

HCG 4156 - Progesterone 17 Friday Jan 7th

HCG 6200 - Progesterone 19.88 Monday Jan 10th

HCG 10,454 - Progesterone 16.3 Monday Jan 17th

HCG 13,787 - Progesterone 23.7 Wednesday Jan 19th

HCG 15,365 - Progesterone 28 Monday Jan 24th

Fetus 1 is 0.89 measurement 157 heartrate (6 weeks 6 days)

Fetus 2 is 0.95 measurement 131 heartrate (7 weeks 0 days)