Something you said just really jumped out at me. You said your fingers look like little sausages. This is one of the first things that my rheumatologist noted was my "sausage digits". He said it is common in psoriatic arthritis. The info he gave me on PA used the term sausage digits over and over again. Did your rheumatoligist say anything about that symptom?
I'm not trying to play doctor on the internet but just thought it might help you.