Not to be rude but I'm genuinely confused why you're confused. You said you got a diagnosis and refused treatment, honestly trying the plaquenil and seeing if it would help would help answer your question, but you then go to another doctor who doesn't even ask you questions and despite lack of explanation of symptoms and positive labs says you're perfectly healthy... It doesn't matter by word of mouth how good people say a doctor is. It's about how they treat the patient and how they actually practice medicine. The fact he didn't get any information from you despite positive labs says a lot and in my opinion and tells you his medical opinion isn't good in your situation.

I'm just really confused why you are seeking a second opinion when you said you've had specific issues for years, you have suspected autoimmune issues for a while and your tests are clearly positive. If you tried some treatments and they didn't work I would get a second opinion but if the first doctor took your medical history, asked questions, went over your labs and did a physical exam I would trust them, especially if you've been suspecting stuff. Just because you can handle pain and what not doesn't mean you shouldn't be treated. I was in pain for 10 years that I just "handled" because no one would listen to me and it turns out I have RA and lupus. It has significantly impacted my life, like my husband having to feed me because I couldn't use my hands and not being able to work, and I wish I would have caught it sooner and could have started Plaquenil so I didn't have to be on all the meds I am now and be in the position I am now. I understand the whole thing is overwhelming and anxiety inducing and I'm sorry you're in this position. Go with the first rheumatologist, take the plaquenil it's the most benign medication and work with them.