It is not news that women love shoes. When you get pregnant your feet may change. My feet grew somewhere between a half and a whole size. This did not happen until I hit my second trimester. Since I am on my feet at my job I noticed pretty quickly that there was a change. I tried on all of my shoes with no relieve. My gracious husband even gave me a foot massage to no end.
There are two things that I found that really helped me. First my sister told me to put my feet up when I was home. This is was huge help. We have a reclining couch and I found out that I needed to put my feet up for about an hour every day. If we went somewhere after I got home from work my feet would be screaming in a couple of hours. The second thing is Crocs. http://www.crocs.com/ These rubber shoes were a life saver. I wore nothing but Crocs for my second and third trimester. I would tell people if you are pregnant or thinking of becoming pregnant to go buy a recliner and some Crocs.
I will tell you to be careful in Crocs. I stepped on a nail that went into my foot when I was in my Crocs. I had to go get a tetanus booster at 8:00 pm the night before my baby shower. My husband was not very happy with me.
I know that not all Moms have swelling in their feet. My sister-in-law wore heals though both of her pregnancies. My feet did go back to their normal size a few weeks after I delivered. I have heard tales of women whose feet actually grew during pregnancy and stayed that way.