Eh, macam tu kena check dengan doctor cepat-cepat la sayang, terutama sebab you punya GDM, sometimes keputihan kuning boleh sign of infection yang kena monitor closely, especially dekat trimester ketiga ni. Perut yang kerap mengeras mixed dengan keputihan macam tu, better safe than sorry kan; a few of my mum friends had similar things around this stage and the doctors ordered swab test je, very simple thing. Since baby aktif lagi tu good sign, tapi jangan delay appointment sebab dengan GDM you memang kena extra careful. Go see your OB or midwife today if boleh!