Hi, thanks for writing to HCM.
From the description, it seems that you might have sustained a fracture
of metacarpal or phalangeal bone in the foot.
A fractured bone produces severe pain
on weight bearing due to the movement occuring between the broken ends of bone (which is true in your case).
* keep the foot end in elevation most of the times
* Ice compressions to reduce pain
* avoid bearing weight on the foot
* use analgesic
Get an xray for the foot which diagnoses a fracture and take an orthopedic surgeons opinion.
Wishing you a quick recovery.