I would be pleased to answer your question.
With the recurrence of the pain , I feel that you do need an MRI of the Spine. There is a high possibility of the spine compressing certain nerves which is resulting in this kind of pain . The inability to stand up from the sitting position surely is a sign of an inflammation either in the spine or the hip.
You should get a repeat study of the spine and hip as that is the only way you will get to know what is going one. Secondly you should start Physical therapy
from an Expert at least twice a week which will help you further as a part of a long term management
You will also need to take Calcium and Vitamin D3
as well as paracetamol
650mg as a pain killer along with the physical therapy( physiotherapy
Thanks and take care