HCG Levels/Miscarriage

Sarah

Hi guys.... I’ve had some cramping. My levels are as follows:

4/15 - 25

4/28 - 2920

4/30 - 4171

5/2 - 4225

5/5 - 4480

Had two ultrasounds 5 days apart. They both showed the exact same thing. I should be just under 7 weeks based on my lmp. Has anyone had this happen with levels and only a sack on the scan and had a successful pregnancy?