Sayang, please go to your clinic or hospital right now , jangan tunggu lepas maghrib. At 23 weeks with twins, any heaviness, pulling sensation, or lower back pain macam ni perlu check immediately, okay? Better safe than sorry dengan pregnancy twin. A few of my mum friends yang pregnant twin memang cakap berat badan baby growing cepat, but the symptoms you're describing, especially the terik feeling dan pressure bawah, kena get checked ASAP, bukan nanti-nanti. Your doctor perlu confirm everything is okay, sebab at this stage it's better to be cautious. Lepas check-up, at least your heart boleh rest, kan? Jangan hesitate to go now, tak perlu tunggu maghrib!