Hi there-
I am so sorry to hear that you are miserable. I too develop horrible swelling when I am pregnant- to the point that my feet grew 3 sizes during my first pregnancy. With my second, they didn't grow too terrible- two sizes but after I gave birth it actually got much worse to the point that everyone was calling me Princess Fiona.
My suggestion is two-fold. Go out and get some support stockings. They are ugly but they made my life bearable and I was so much happier with them on. For me, I had swelling in my legs too and so I got the kind that went up to my thigh but if you don't have that much swelling, I wouldn't worry about it.
The other suggestion is shoes that fit that just slip on- much like slippers. I had one pair and wore them out like crazy. Fortunately, I was able to wear them most of the pregnancy but if you have this kind of swelling now, you are almost certain for it to continue so I would go and buy another pair of shoes that will allow you to grow and hopefully, the support stockings will prevent much more swelling.
Hope this helps. Good luck!
N.
Ps. Please check with your doctor to make sure that you don't have Pre-eclampsia- which could cause your feet to grow significantly.