HCG still high after miscarriage

Monica • 👼🏼 👼🏼🌈 👶🏼
I started to miscarry naturally on Jan 15th when I was 13 weeks. At that point my HCG was a bit over 2,000. I continued to have bleeding/spotting until February 7th. But during this time my HCG hasn't dropped much. My levels have been...
Jan 15 - 2,000+
Jan 26 - 450
Jan 30 - 215
Feb 6 - 135
I go for another blood test on the 14th and another on the 21st, followed by another ultrasound on the 24th. Has anyone had their HCG take such a long time to drop? I'm so worried that there may be tissue left over and after all of this I may still need to go for a D&C in the end of it. I just want this over with so we can start trying again!!