Ouch! I was always told to drink plenty of water and put my feet up to reduce/prevent swelling. I'm assuming you're outdoors and it's hot so getting out of the heat may help too. Good luck!
I'm having the same problem!! My OB said stay inside and keep your feet up as much as possible, especially when it's hot out. I have no time to keep my feet up but I've just been drinking extra water and trying not to look at them haha! Good luck!
Re: Swollen feet!