Have your partner massage every night! It helps!! Also there’s a spray I bought for prego feet. It helps with restless leg & foot pain! :) I spray it before going to bed and my feet feel great in the morning.
I had this and over the next few weeks my feet and legs started swelling- compression socks and insoles for my shoes helped a lot and 3 days after I gave birth i felt like I had my normal feet back
I had plantar fasciitis when pregnant, stated around 7 weeks for me, might be a good idea to see a podiatrist, even if they can recommend some arches for your shoes. good luck.