Early for blighted ovum diagnosis?

I’m posting because I’m at an absolute loss here. Had some very very light, intermittent spotting and they sent me for an early TVUS (did abdominal too) to rule out ectopic. Impression was early intrauterine pregnancy vs ectopic vs failed pregnancy and had an empty gestational sac measuring at 5 weeks + 1 day. All that I’ve read has pointed to that being super early still to see a yolk sac etc. They had me repeat hCG 4 days after that scan and it was almost 30k. Which means they were maybe 12-15k on the day of scan possibly?? Doctor called yesterday and diagnosed me with a blighted ovum with zero hope of this being a viable pregnancy saying she would have expected to see something on the scan with levels that high, yet she didn’t truly know my numbers on the day of the scan. I’m gutted… isn’t it too early to give me this diagnosis? I begged for another scan, which I’ll have next week at 6 + 4 days. I’m in this limbo of grieving my first pregnancy yet can’t accept that it’s over. Looking for any advice or reassurance 😔 thank you ladies.