Wondering is it just water that's causing my foot to hurt? It started on Monday when I left my Nst…

Wondering is it just water that's causing my foot to hurt? It started on Monday when I left my Nst and was walking home. I stayed off it and went yesterday now is hurting again. Doesn't feel broken or none of them when I spread my toes all of it just cracks and it hurts to walk on my foot so I only walk on my toes. What could this be?