I have had this rheumatological condition - that's what the rheumatologist called it - for 40ish years, and I suspect "vaccines" to be the culprit. Yes, it is undefined. My SED rates are normal, and unlike My mother, who had rheumatoid arthritis, My joints are not deteriorating. But any repeated movement for any duration, or long periods of pressure (like standing), and they hurt, and swell, and get pink, and hurt worse, and are a miserable thing to endure. This is why I am restricted to desk jobs. I would be asking People if They wanted fries with that, otherwise.
The rheumatologist - He was head Rh at Kaiser in LA when I lived there - said it is rare but not unheard of for SED rates to be normal and still have a condition.
Don't eat meat, though I do like eggs every now and then... The only dairy I have is a splash of 1/2 & 1/2 in My cup of coffee in the morning - like I said, it is My one treat, that cup I wake up to. I love sugar in it but have moved to liquid stevia, not because I prefer it but because I just don't want the sugar, and it's not too much of a diminishment of pleasure.
As for My balance... I could go into the mildly horrific last few years of My life, but there is nothing to be done about it and I persist in looking forward; My work comforts Me. And more to the point, I am driven. There is such a sense of urgency - as though a voice is saying, if it doesn't come out NOW, it will be too late. So I do what I can while I have a connection to the interweb. I may not have one at any moment. Things are...tense, in that I am a highly organized, and rather minimalist sort, and the mess I live in now is disruptive. But I endure, because it's that or back into a shelter (and I REALLY don't want to go to a shelter again! Now THERE's stress!) But at any time, My friend just might decide that He has had enough. I never know.
And honestly, I truly am comfortable with who I am and where I am going. Except for the swollen calves and feet. And I think the diet, especially, and any exercise I am able to get will help greatly. I take full responsibility for where I am, and oddly, though I fought to make it not so, I have known all My life I would be right where I am. Not the details, but the generalities. I am sorry to hear of Your difficulties. I would never wish them upon a soul, but in this economy, many, many of Us are falling where We always thought We would fly.
Anyway, I will, as I said, make changes in diet when I have that option. I will look into qigong, and do what I am able.
Again, I want to thank You. This gives Me proactive choices which promise to fix what ails Me.