Hey Seb,
Don't worry god it trying to test our patience, but there must be something good for us on the other side.

I was also having tremendous pain last year and my NSAID's are like not giving me enough relief from pain. Then i switched to Ayurveda treatment and it really helped me to control my pain and my regular activities.

My cousin brother is also HLA B27 +ve from last 10 yrs and suffering from fusion in neck region he recently undergone Ayurveda treatment in India and he is feeling lot more better now.

The treatment is simple you just need to do is , oil massage your body regularly followed by steam bath or sauna so that your skin pores will get opened up to get more oil into that which will reach till your joints.

Basically why we are getting pain is because our joints are getting closer because of inflammation and they pain when friction happens so if we can add some lubricant to it the pain would be less isn't it.

Plz try this. this helped me really. It may take few days but it is harmless and good for everything.