Hi.
I hope you find your path to better pain level.
Do you have clearance to exercise, and do you do some level of it?
My suggestion would be to engage in some program which won't create pain, except the expected soreness, to build muscle (even in the feet). If you have access to Silver Sneakers or even a pool, getting into a less that full gravity environment may be helpful. You can use a floatation device (pool noodle) if you don't want any weight on your feet but you should be comfortable in the pool setting.
Best!
Ann Marie