Tips on getting your swollen feet to go down?

These past few days my feet have been BALLOONING UP! that is not a understatement, they get so swollen and hurt! And last night even got as bad to the point where i could barely move some of my toes. I can barely even fit in my sandals either. I heard elevation works so last night i slept with my feet propped up on a pillow, but when i woke up they are still swollen. Not as bad but still are pretty big. I also tried to soak my feet in Epsom salts. Is there anything else i can try?? Its hard to stay off me feet as i care for my 3 year old and my two puppies. I am also 38 weeks.