I'm sorry to hear about your foot pain. My mom has that. It started suddenly in December. Her doctor told her that it's because of her osteoporosis. I'd never heard of it affecting the feet like that before. She's normally very active, but the pain is limiting what she can do.
She found some things that have helped. Aside from getting off of her feet when it's flaring up, she uses ice and biofreeze for the pain. Recently she got new Easy Spirit shoes. They lace up so she can wear them loosely tied. To make them even more comfy, she replaced the insoles. The ones that she got are called Superfeet, and she swears by them. Both were bought off Amazon.
Link to insoles - https://www.amazon.com/Superfeet-Insoles-Professional-Grade-Orthotic-Green/dp/B002T0072U