My uterus literally feels like it going to drop out of my vaginA towards the end of the day after being on my feet or walking a lot. Its so uncomfortable :/ I'm only 27weeks and can only imagine later on !
I also have lower back pain and sometimes feel stiff If I sit too long. I sit with a pillow behind my back which relieves the pain some and try to prop up my feet for the swelling. You could try soaking your legs in Epsom salt. It may help
I have them sometimes. My doctor told me it's caused from stretching. My feet and ankles are swollen as well