I had foot/ankle pain, although not as bad as it sounds like you are having.
From all of my research and talks with my care providers, this is normal with increased physical activity after a TPF. After a TPF one has to severely limit movement and activity. The muscles, soft tissues, and nerves all can get very “lazy” from this time off from performing like they generally do.
As such when they are first called on to behave in a somewhat normal fashion, there may be some pain involved. I was told I just needed to work through it.
Think of it as another gift given to you by a TFP! But if it continues too much longer or is just too intense, talk to your doctor.