Aiyohhh, at 5w3d ada keputihan kuning pekat memang boleh bikin worried, tapi tengok dulu lah, yang important ialah takde gatal-gatal or bau yang pelik kan? Sebab normally kalau keputihan itu bening or putih susu tanpa bau, memang normal je sebab hormone changes dan more blood flow down there during pregnancy. But kuning pekat ni actually dapat be a sign of infection, so one of my mum friends mentioned her gynae always check the colour and smell closely, kalau ada bau amis or gatal starts, that's when kena go see doctor.
Since you're early in pregnancy, better safe than sorry, best to give your doctor a quick call or WhatsApp your clinic just to confirm lah, especially since the colour's darker. They might just want a quick swab to rule out anything, and then you'll rest easy!