Natural miscarriage vs dnc

I had a miscarriage 5 weeks ago and my HCG levels are still high even though I have stopped bleeding. Doc said that still left over tissue and could go of awhile and not come out, because of it my levels won't come down so can't ovulate = no baby any time soon. So option is to let it happen naturally eventually or have a DNC and have it over soon so body will ovulate. Confused what to do anyone have any experience with either?