Slow rising HGC levels

💗love my girls❤️
I don't kno if any of you ladies can help or have read a previous status? This week has been one of the worst weeks of my life! So basically I had an early scan at what I thought I was 5 weeks pregnant, turns out just an empty sac no baby no yolk sac! Hgc levels 4000, 1 week later still empty and levels of 16000, 2 days later level of 20,000. So my levels are rising but not doubling and my sac is still empty at 6weeks 5days if it's correct weeks! My doctor wants me to do a D&C. I don't kno what to do! I have no cramps no blood no nothing!!! I need a few words of advice! Please X