Sayang, this is something you really need to confirm with your doctor or gynae urgently, don't worry sendiri-sendiri! Every pregnancy develops differently and timing can vary, so it's best to get a proper scan and professional assessment rather than compare with others. A few of my mum friends went through similar worries, and most turned out fine, but some did need follow-up scans for peace of mind. Your doc will know best what's normal for YOUR situation. Jangan delay, okay? Get an appointment ASAP so you can have proper reassurance. Sending you lots of calm thoughts!