It is very normal to get swelling, dear, so don't get scared. Try to keep your feet resting on a pillow when sitting. Taking a little rest and keeping hydrated helps a lot.
My MIL told me to avoid sitting with hanging legs for too long and to massage feet gently with warm mustard oil. It actually worked wonders for my swelling, u can try it ghar pe.
Haan, extra fluid weight ho jata hai na body me, isliye swelling ho jati hai. Mere feet toh pure bhaloo jaise ho gaye thhe last trimester me! Walk thoda slow kiya karo aur legs hang mat hone dena jyada.
Actually, my doctor told me that the body produces around 50% more blood and fluids during pregnancy to support the baby. Because of progesterone, water retention also increases, which causes swelling in feet and hands. It's usually standard, but definitely track your blood pressure just in case.