Sayang, perut pedih masa pregnant kena perhatian, please go see your doctor atau klinik as soon as you can, okay? Boleh jadi normal stretching, tapi better safe daripada sorry, especially at 4 months. Regarding baby movements, at 4 months some mums dah rasa soft fluttering (like butterflies!), tapi kat orang lain baru terasa nanti. It varies, so jangan worry lagi pasal tu, focus on the tummy pain dulu. Go check with your doctor, yes? They'll scan and confirm baby's okay. Sending you gentle thoughts!