I would personally go get it checked to be safe.
Try when resting, lifting your legs higher than your heart height.
Was about 2-3 weeks before my swelling went - although 1st week I was completely bed bound so that wouldn’t have helped
My midwife warned me they would get worse before they got better. She said it was totally normal. She also warned me that usually when they go down it’s usually through night sweats. I can’t remember how long it took (a few weeks I think)
I was super swollen for 2 weeks after. In fact, I was so swollen that some of my stretch marks are from post c-section rather than pregnancy. 🤣
Same thing happened to me I asked at my 5 day check up the doctor said it was all the fluid that used to go to baby it would go down eventually and it took about 2 weeks to go back to normal