When will the bone pain be cured totally after taking AKT 4?

Hello doctor,

I had tailbone pain. I started having pain in my left buttock and upper thigh after a month. The severity increased, and I found it difficult even to walk. I was advised the tablet Nucoxia for a week, but even taking it, the pain was severe. I then had an MRI scan done and was diagnosed with a left psoas abscess. It was diagnosed after one to one and a half months after the pain started. I have been taking AKT-4 tablets for one month. The pain increased a little, shifted to the right leg also, and now it seems to be decreasing. Now, I can walk normally. However, when I sit, I still have pain in my tailbone. Along with this, the doctor said that I have ankylosing spondylitis, for which I am taking Ayurvedic medicine. I have been told to repeat the MRI to check the progress after a month. How long does it take for the pain to fully reduce once AKT 4 has been started? In the MRI, it was mentioned that the infection process was most probably Koch's, but how can this be confirmed?

For ankylosis, I was prescribed the tablet Saaz, but the Ayurvedic doctor told me that it is an immunosuppressant and since immunity is necessary for Koch's disease, I discontinued taking the tablet after a week. Along with this, I am taking Folic acid and Benadon 40 mg tablets. What foods can help to build immunity? Please help.

Thank you.