Leg and feet swelling

Casey
So I am 28 weeks and my legs and feet have gotten so swollen! And they hurt when I am on them even for ten mins. Anyone have any ideas for relief? I didn't expect it to start this early. It's really humid where we live and I think that's a comtributing factor. I drink quite a bit of water to help but I feel confined to the couch because they hurt. Help!