Do you think you're original?

Sometimes I feel like nothing I do is new… that the few things I think of on my own have already been done, and a lot of what I think has been shaped and sculpted by people around me.
And I wonder how much of what I believe came from me, or came from others telling me that that was the way the world worked when I was little.
And sometimes I feel that even every question I ask on fluther has already been asked and answered a hundred times over…
That there are these general topics and opinions, just in life, overused theories, and I just get to pick out of them, or add a few of my own bricks on the tower of an idea, rather than creating my own.

I wonder if we’re as creative now as people before us had to be… like, who did think of that darn wheel first? And even if we do think of some new thing, that it’s just barely new, building on something that’s already existing.
I dunno. I just…
Do you ever feel unoriginal?