Miscarriage or molar pregnancy??

Stephanie • Married 2 years, 4 baby losses. Jun 2017, chemical. Dec 2017, missed miscarriage. Jul 2018, ectopic, lost left tube. Nov 2018, missed miscarriage.

I was told I had a miscarriage as my HCG was slow to increase and the US showed just a sac. I took misoprostol on Nov 22 and at the follow up appointment 5 days later, was diagnosed with an incomplete Mc and I still had some leftover uterine lining.

It’s been about 3 weeks and I still tested positive for a pregnancy test. My HCG never rose past 4000 so it shouldn’t take this long right?

I’m so terrified, my dr is scheduling two more HCG tests to check. Has anyone gone through this?