Swelling at 16 weeks

Swati
Hi all this is my 3rd pregnancy and I have defiantly noticed the changes in how I feel from the 1,2 and now third. I've noticed that my angels are swell if I'm sitting for too long.  Which sucks bc I have a desk job.  Anyone else? I am drinking almost 3 liters of water a day. I have eaten saltier food than normal due to the holidays and peoplr constantly brining in something to eat but just wondering if anyone else if also feeling it