Thank you for posting your query at DoctorSpring. Firstly, my sincere apologies for the exceptional delay due to unforeseen circumstances.
Well looking into your problem, I would like to tell you that it is quite possible that it is due to your existing disease. Since your CRP is 129 , it is suggestive that high amount of inflammation is going on in the body. An ESR will be more helpful.
I would still like to tell you that you get yourself tested for HLA B-27 if any kind of spondyloarthropathy is going on will be clear. Your treating doctor will be able to tell you rightly because physical examination is very important in deciding the disease.
All the autoimmune diseases have a tendency for overlap with each other so one cannot say anything with certainty but it looks like a consequence of your existing disease.
Hope this helps, please feel free to discuss further.