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I went through your post. Things which favor the diagnosis of autoimmune disease in your case are as follows:
- Pain and swelling of joints.
- Puffiness of hands and feet.
- Dryness of mouth and eyes.
You need to be investigated for UCTD (undifferentiated connective tissue disease), RA (rheumatoid arthritis), Sjogren's syndrome.
The tests you need to do are ANA (anti-nuclear antibody), dsDNA (double-stranded DNA), CBC (complete blood count), anti-Ro/La (for lupus erythematosus), RF (rheumatoid factor), anti-CCP (cyclic citrullinated peptide), urine examination. Once reports are available will help in confirming the diagnosis.
For more information consult a rheumatologist online --> https://www.icliniq.com/ask-a-doctor-online/rheumatologist