Possibility of cerebral palsy
I have studied your case.
As per your history there is possibility of cerebral palsy mild variety or muscular dystrophy.
You may need investigate like CPK blood level, EMG-NCV [nerve
I will advise to consult orthopaedic surgeon
for clinical examination and further investigation.
If there is tightness of tendo-achallis tendon then surgical release followed by brace and physiotherapy
will help to improve deformity
You may consult physiotherapist for guidance. If required you can use orthotic supportive brace like [Floor reaction orthotic] for improving walking.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.