6 week ultrasound no sac

Hi everyone I'm 6wks 2 days and started bleeding last night exactly the same as my period usually is. I know its a miscarriage. Just had an ultrasound and he couldn't see a sac, I was wondering if anyone else has been through this and if it is a chemical pregnancy/early miscarriage?

I have an appointment with my dr in a few days and wondering if I need to request d&c? Thankyou