Dear friend, welcome and thanks for entrusting your query here at HCM !
I am concerned about your large number of symptoms and no conclusive diagnosis.
From your description and findings , i would suggest to get evaluated at a good tertiary / university hospital and consider ruling out connective tissue/ vasculitic / autoimmune disorders
.( which usually present like this)
A lymph node biopsy
would be an easier thing to get a clue.(a surgeon can do it)
Consider full lab including CBC, ESR
, ANA, c ANCA, pANCA, anti DS DNA, CRP, LFTs, RFTs, urine routine, Xray chest , ECG, TFTs.
Take a rheumatology opinion.
I am almost sure we will hit a diagnosis.
These disorders demand patience to get diagnosed and treated.
I hope you are fully satisfied with the guidance I gave.
I would be glad to answer any further queries.
Thank you and Good luck !
Dr. Prasad Akole