Sayang, this is something you really need to check with your doctor or OB-GYN asap, jangan delay! At that stage, they should be able to see the gestational sac on TVS scan, so it's important to get a proper assessment in person. Could be dating issue, bisa juga other things yang kena confirm with scan dan blood tests. One of my mum friends had similar situation and it turned out timing was off, tapi dia kena follow up closely with her doctor. Jangan worry dulu, but do make an appointment today if you haven't already. Sending love!