Thanks for writing in,
Your symptoms and blood investigations reveal that you are suffering from Ankylosing Spondylitis
(AS) along with Vit.D deficiency. AS needs life long treatment with disease modifying drugs(DMRD). Medications with physiotherapy/mobilisation of spine and joints are the one which will decrease your pain and progression of stiffness
. These medications need to be titrated by regular follow-up. If your pain is not getting controlled, its better you consult your doctor. He might increase the dosage of current medications or add some steroids/methotrexate
If these medications also fail to control your pain, then you might need TNF-alfa inhibitors.
Physiotherapy with mobilisation of the spine and joints will help you.
Wish you a good health,