Sayang, I know takut sangat, but please don't worry alone, go for that repeat scan your doctor suggested, okay? Sometimes dating bisa off or the pregnancy just needs a bit more time to show on scan, and your HCG level masih ada. A few of my mum friends went through the same worry at 7 weeks and everything turned out fine after the repeat, just follow your doctor's timeline and you'll have clearer answers soon. Hang in there, and jangan stress sangat for now.