Whoa whoa whoa, why would you think getting diagnosed would lump you in with them?
Unless you meant self-diagnosed, but even then, there are self-diagnosed people who don't shout it from the rooftops or even claim that they have it with certainty. (They are really rare, though, and it's still not a good thing to self-diagnose)
But if you were to get officially diagnosed, well, I don't think anyone would accuse you of being a tumblrina. Unless they were stupid edgy types who believe psychology is a shame.