Help..confused!!!

Hi.. really need some advice and help.

My last period was 6/13. We started testing HCG below is the numbers..

After 72 hrs -75% increase.

After 48 hrs -60% increase

After 48 hrs -50% increase.

Did scan on 1st Aug- showed sac.. measured 5weeks 6 days instead of 6 weeks 6 days.

Did second scans 6th Aug - measured5 weeks 6 days still .. but comparing from last thru should be 6 weeks + . And no heart beat too.

Again yesterday did HCG test. Result was 2700 on 7/31 and 8/6 was 5400.

No bleeding no cramping.

After yesterday’s scan Doc said it’s a miscarriage and I can go with D&C. I said will wait for naturally flush out for next 2 weeks.

Nurse called today and said HCG doubled from 7/31 to 8/6..

Anything makes sense ?????