Sayang, lower abdominal pain at 25 weeks boleh jadi normal (ligament stretching, baby growing), tapi kalau sampai susah nak jalan dan sakitnya terasa quite intense, better you check with your doctor or midwife just to be safe, tak payah tunggu lagi ye, especially kalau pattern dia berubah atau ada bleeding. Most of the time it's nothing serious tapi your peace of mind is important, so jangan hesitate nak call clinic or pergi cek. Take care of yourself, ok?