Sayang, ini ada kena dengan cervix atau pelvic floor situation, so kena check dengan doctor you ASAP lah, jangan delay, okay? A few of my mum friends ada similar concerns during pregnancy, but honestly setiap situation berbeza, and at 25 weeks ni kena proper assessment from your OB. They'll do scan and check exactly what's happening, then guide you properly on whether you need rest, medication, or monitoring. Please don't worry sendiri, get an appointment asap and let the expert see you. Better safe than sorry when it comes to pregnancy, kan? Minta hubby drive you pegi hospital or clinic today if boleh. Take care, mommy!