Time waits for no-one

So it’s my birthday in…a couple of hours. And that’s a weird feeling. I’m turning 34. I don’t feel like I’m turning 34. I don’t feel like I’m even close, honestly. It’s like…aren’t people this age supposed to be a little more, I don’t know, sorted? As in, pick a career track and stick to it, be so settled in a relationship that even the though of being with someone else would be inconceivable (I’m settled, but not THAT settled), feeling generally like things are winding down? I don’t feel like things are winding down. I feel like I’m due for another big dramatic change, actually.
Physically I don’t feel old at all. I mean, I can see lines where there used to be none, and the body is not as firm as it used to be, but in general…I actually feel healthier overall than I did ten years ago. It doesn’t feel like things are breaking down – my back doesn’t hurt, I have less headaches than I used to, if anything I have more stamina now. I do seem to need a little more sleep, though. All the things I really like are the same things I really liked when I was 25, or even 17. I’m calmer, there’s a sort of serenity there that wasn’t there even 5 years ago, but other than that…nothing much seems to have changed.
Eh, it’s weird. Anyone else have any idea what I’m talking about? It’s as if I have this idea in my head of what 34 looks and feels like and that’s not how I look or feel, and it’s wierding me out.