Anyone else experience this much of a rollercoaster or have any insight as to what is going on?

LMP - Jan 16

Positive LH/OPK - Jan 31

Positive Test - Feb 10

HCG:

2/12 - 64

2/14 - 153

2/17 - 371

3/7 - 29,503

3/12 - 26,903 with spotting at ER

3/14 - 57,474

Ultrasounds:

2/22 at RMA - measuring 5 weeks 0 days with a gestational and start of a yolk sac

3/7 at RMA - measuring 6 weeks 0 days heart beat 96bpm

3/8 at LVHN - measuring 6 weeks 0 days heart beat 127 bpm

3/13 at LVHN - measuring 6 weeks 0 days heart beat 96 bpm

Originally was going to work with RMA fertility due to unexplained infertility and also MFI. Ended up getting pregnant naturally. So I’ve been seeing RMA and by regular OB at LVHN. Multiple ultrasounds showing 1 fetus. Heart rate varying between 94-127 bpm. Measuring 2 weeks behind and last ultrasound showed no growth in 5 days. Started spotting again 3/15 but it only lasted an hour. This whole weekend I’ve been nauseous. Fairly confident I’m miscarrying and it’s just being dragged out. Next ultrasound is March 23 and I’m such a wreck. I just need answers so I can move on