Mengah dan perut kembung tu memang sangat common masa 28 minggu, especially sebab baby dah besar dan pushing against your lungs and stomach, a few of my mum friends complained about the same thing jugak! Tapi kalau sengkak tu tiba-tiba severe or accompanied with headache, blurred vision ke, better check with your doctor cepat-cepat just to be safe, dapat peace of mind kan.