Has anyone had a crinkled yolk sac and gone on and had a Healthy baby or miscarriage?

I’m 6 weeks 1 day according to dates of period but actually 3 weeks if you go off conception/ovulation. I had a scan yesterday which showed no heart beat & a crinkled yolk sac. How ever my HCG levels are still doubling every 48 hours.

They around around 3500. They were at 1200 48 hours before that number. They have said my yolk sac is crinkled. I’m so confused what’s going to happen. I don’t want to just wait around to miscarriage. :( this is my rainbow baby. The scan had me measuring 7 weeks 1 day. Which I can’t be! Because I miscarriage on the 1st august previously. Any advice anything anyone been through something like this.