I'm also what they call sero-negative and still have moments of denial and it has been 5 years for me! I'm 38, and what gets me at times it that I can still remember what it was like before RA, and I have yet to feel that way even with meds, even though I still hold out hope!
I know what you mean about feeling old! There are days when I think to myself, what will I feel like when I truly am old?? I can really work myself into a tailspin!
The others are correct, it does take finding the right "cocktail" so to speak, and then some days are just tougher than others. It's also about finding your limits, and knowing what might trigger a flare, and I know for myself if I don't get enough sleep and I run myself ragged, in a few days, I'm in big trouble!!
You found a great site and everyone here is so nice and supportive, welcome and post anytime!