Tvs at 6+4 is off by 9 days with regular cycles. an early loss??

Hellow..thrid time pregnant with REGULAR PERIODS (28 days) AND USING LH STRIPS FOR OVULATION(ovulation 12-14 cd)

(1 blighted ovum/1 normal pregnancy)

Here are my hcg results

12 dpo -60

14 dpo -329

At 5wk +1 day-13,513

At 6w+2 day -17,240

My usg was due at 6w+4d ..i had a GS measuring 5w+2 d ,yolk sac and a very small fetal pole measuring around 2 mm with no cardiac activity obviously.i had a 27 -28 day cycle and i used lh strips and ovulated around cd 12-13 .

So this does not look promising to me..i m yet to consult my obgyn tomorrow but the radiologist has advised repeat scan in 1-2 week

Anyone with similar experience with regular cycles and known dates ?????any positive experience??