G.C.
I started swelling really bad at 20 weeks, so I understand what you are going through. My OB said that was unusual, but nothing to worry about (in my case), and that it would only get worse (which it did in my case - I was the size of the stay puff marshmellow man). I recomend compression tights when the weather gets cooler - I lived in those - bought a pair at motherhood maternity. Also, kept my feet up as much as possible, cut out sodium, and drank lots of water. There wasn't much else I could do. Walking helped with the swelling too! I also had to take off my wedding rings at that time as well, as they no longer fit. In my case the swelling didn't go down until after I had my son - but as soon as I left the hospital all the puffiness was gone.
Good luck!