Honestly, I haven't heard of this being a real thing na nangyari sa actual moms I know, but I think what you're asking about is when someone doesn't realize they're pregnant until later on, diba? That can happen talaga, some women have irregular periods, so they don't suspect, or the baby is positioned in a way na hindi gaano halata ang belly. I'd really suggest talking to your OB about what you're experiencing, kasi they can give you the clearest picture with an ultrasound and proper check-up, especially if you're worried about your pregnancy or how it's progressing. Have you been able to see a doctor yet?