Foot Injury From Cycling?

so bit of a backstory, i have a bad foot anyway as when i was 16 i broke my hip and i stretched the nerve in my leg that gives the foot movement so i cant move my foot up and down i have what they call a foot drop.

luckily i have a splint that enables me to be able to walk and do day to day act ivies. I am a big guy and this past week it was nice outside and i decided to bike to my mums house (aprox 10 minutes) it was a little difficult and i struggled a little but i made it there and back in one piece at least thats what i thought.

i woke up monday morning and my foot was killing i tried to walk and was met with instant pain down the back of the heel and under the ankle. as of writing this its still in pretty bad shape and i still havnt been able to put weight on my foot at all and under my ankle is really swollen. i dont think anything is broken or fractured.

anyone know what the injury could be and should i get it checked by the doctor?