Sayang, leg swelling or heaviness during pregnancy memang common, tapi kalau dah 2-3 hari tak lega especially from hip down to ankle, better go see your gynae or go to clinic/hospital jadi dorang boleh check proper, just to be safe, okay? A few of my mum friends had similar symptoms midway through pregnancy and it was nothing serious, tapi kena confirm dengan doctor sebab pregnancy sometimes boleh cause circulation issues yang perlu monitor. Rest as much as you can, try raising your leg, and minum plenty of water in the meantime, but get it checked soon lah!