Ay, ang swelling sa 21 weeks is pretty normal, lalo na pag mainit at marami kang standing around, but mas safe talaga na i-mention mo sa OB mo next visit para sure kung normal lang or may kailangan i-check! A few of us preggy mums swear by elevation, pag gabi nag-put kami ng pillow under our feet habang natutulog, and drinking lots of water actually helps din kahit counter-intuitive ito. Also try to avoid salty foods masyado at wear comfy, loose shoes, pero honestly doc mo ang best na makakasabi kung kailangan ng extra attention.