Pregnant after miscarriage question

Valerie

I miscarried exactly 5 weeks ago today. I am already pregnant again. My levels taken yesterday were at 423. I’m not quite sure how to date this pregnancy and not sure when we conceived. 423 is high 4 weeks range and lower 5 weeks. I’m trying not to be worried again but it’s hard post miscarriage. Anyone else? Does 423 seem promising? (I am going back for repeat tomorrow)