Ai, 23 weeks ni mmg period yang ramai kita rasa sakit pinggang dan pelvis, tapi kalau sakitnya sampai ariari and gerakkan sikit je dah terasa cucuk teruk, I think better you call your OB or go to clinic to get it checked properly, nurse tadi maybe just routine check, but this level of pain tu boleh jadi something else like SPD (symphysis pubis dysfunction) or nerve pinching yang perlu proper assessment. A few of my mum friends had similar issues and after they see the doc, boleh dapat physio or specific stretches yang actually help. Jangan tunggu lama-lama, sebab if it affects your movement ni lama-lama akan affect your mood and rest, and you need that energy for the remaining months. Minta referral ke physiotherapist or OB yang boleh tangani this, usually after proper diagnosis boleh manage dengan better, jadi takut jangan.