Does sound like an acute arthritic episode or perhaps gout as an outside call.
Not keen on Panadol as you need an Non Steroidal Anti Inflammatory such as Ibuprofen.
If you can take ibuprofen, the 400 mgms every 4-6 hours if required.
If you can take Ibuprofen , the Paracetamol 1,000mgms when required up to 4,000mgms a day (if required).
Cold or hot compress may ease the pain and try and keep you foot elevated.