how long did it take for your HCG levels to get to 0 (or under 5)?

Can you tell me how long it took for your hcg levels to get to 0 (or under 5, depending on how your doctor tracked it)?
I had a miscarriage at 6 weeks about a week and a half ago. I stopped bleeding a few days ago and my last blood draw (yesterday), my hcg was at 9. I'm hoping it's at 0 soon so I can move on from this whole experience. Not sure if it effects how long it takes for hcg to go down but I had a natural early miscarriage (no d&c/d&e and no meds).
Thanks for sharing!