Ahhh mama, 5 jam tu memang panjang sangat especially at 20 weeks! Celah kankang sakit is SO common during pregnancy, ligaments tu dah stretch and relaxin hormone memang buat semuanya jadi loose dan sensitive, so jalan lama memang trigger rasa ngilu tu. A few of my mum friends complained pasal benda yang sama dekat second trimester, especially after hari yang hectic. Try istirahat dengan kaki naik, pakai kasut yang support betul-betul (jangan sampai tergantung dalam heels!), and pelvic support belt mmg membantu ramai, or kalau sakit persistent better check dengan doctor pasal pregnancy pelvic pain tu ye, sebab kena rule out anything else.