Sayang, sakit bawah perut yang teruk macam tu at 30 weeks kena check dengan doctor ASAP, jangan tunggu lama-lama ye. Could be round ligament pain (normal) or something else yang kena perhatian, so better safe than sorry! A few of my mum friends had similar scares, turned out okay, but the doctor check was worth it for peace of mind. Go to your clinic or hospital today if you can, or call your gynae untuk tanya. Jangan tahan sakit sendiri lah, this is your body telling you something. Hoping it's nothing serious, but please get checked out today