TTC before period returns

I was supposed to be 9 weeks when I miscarried on Christmas Day. Last week my HCG was back to normal and I stopped bleeding a few days ago. My dr recommend waiting for a period before trying again for dating purposes and when I questioned it they said I can do what I want but that’s their recommendation. They said no data clearly saying there’s really any benefit to waiting.. I’m confused then why they think I should wait? Is there any risks to not waiting? Do I still need to worry about possible infection? I am so ready to start trying again.