Not neccessarily, but it really does depend. If your period returned within 3-4 weeks of the D&C and you've haven't had bad cramping, heavy heavy bleeding or a temp or feeling sick, then it is likely your body has healed itself well. Just remember you are the consumer of your medical treatment, the customer. You can at any time go to your GP and ask to have a blood test to see that your HCG is tracking down.
I haven't had my HCGs monitored to >5 with all of my miscarriages, but I also never had complications with infection or retained products either. So it really all depends on what is normal for you.

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"While it may not pay to be different, who can really afford the price of being the same?"
DS 9yrs, DS & DD 5yrs, DD 4yrs
Plus 9