I suffer from severe knee pain. On this year's hajj and during the second round of tawaf al-ifada which I was performing on the second floor, my knee started to hurt so I resorted to using a wheelchair pushed by a small boy. Due to the severity of pain, I am not certain whether I performed six or seven rounds. The boy is certain they are seven although I am doubtful. What is the legal ruling in this case?

If the case is as mentioned in the question, that the inquirer used a wheelchair pushed by a small boy and the boy confirmed that the inquirer completed the remaining number of rounds, the inquirer's hajj is valid and he must not heed his doubts.