Thanks for writing your query
After going through your suffering, it seems you have developed some sort of muscular weakness
that is the reason for the way you climb stairs we call it ''hand to knee gait''.
My advice would be if possible getting EMG/NCV study for muscle and nerve
for lower limb to confirm the diagnosis.
Take care and I shall be glad to answer any further query.
Dr.chugh, Orthopaedic surgeon