HCG still positive after 8 weeks

Kaleena

After TTC for a year and being diagnosed with mild male factor infertility, we conceived after our first cycle of <a href="https://glowing.com/glow-fertility-program">IUI</a>. At 6 and 7 week ultrasounds, there was no heartbeat, and I had a D&C; on June 20. My HCG has been falling exceedingly slowly from a peak of 7700. Last week it was 34. Today, 8 weeks and 2 days after the D&C;, it was 21. I am so frustrated with my body for many reasons, and I feel like I can't move on emotionally when I know my body still thinks it's pregnant and I have to go for weekly blood work. Does anyone have experience with this? My REI insists it's in the normal range, but people seem to fall much more quickly, and I'm worried. I've had intermittent spotting for the past 10 days, no other symptoms.