Hi, thanks for writng to HCM.
Generally, soft tissue
healing around the hip joint after a THR should subside within 3 weeks and should not produce pain after that period.
I feel that the pain could be originating in the periarticular region possibly from the muscles due to vigorous physiotherapy
Your headache could be a side effect of the drug "percocet" (oxycodone+acetaminophen
If you have any more issues, please consult a physician. Regards