My apologies Gillianren. Recently I've heard several people younger than myself (some even in their 20s) complain that they're getting/feeling old, and I didn't realize that in your case it was due to a medical condition. 
Well, at the moment, it's more that I am old to have this particular medical condition. It means I'm at higher risk for a few issues, because my body isn't supposed to be doing this much past thirty. Being thirty-five or older is actually in the medical literature as "of advanced age." As my doctor has easily fifteen or twenty years on me, he laughed at me about it, and he sympathized that the books for laymen (only, you know, not so much men . . . ) insist that it's "middle age" if you're my age.
Of course, I
also have scoliosis in my back and arthritis in my knees. And my in-person peer group is for the most part five years or more younger than I am, and most of them were exposed to pop culture late. Combine all of that, and I pretty much
always feel old. It's just that, at the moment, it's official.
