I don't know if this post will get any traction from other otherkins/therians, but...
I know this question is cliché, but could I be an otherkin?
Sometimes, I can feel a sort of phantom tail and fur on my body like right now. And sometimes, I am disappointed that I'm not really an anthro raccoon, that I don't have the same ability as them and me doing anything raccoon-like would be seen as weird. And sometimes, I feel weirdly excited at the idea of me being an anthro raccoon.
The thing is, all of that only happen sometimes. Not being an anthro raccoon doesn't make me miserable, definitely not as much as my gender (I'm transgender). I can live as humans. While there is some weird energy sometimes, most of the time, I'm not interested with the idea of me becoming an anthro racc. But I wouldn't mind becoming an anthro raccoon...
Think of it this way. Cis people don't ever ask themselves "Am I trans?" Or, at least they never dwell and obsess on the question like trans people do. (That was my experience at least.)
I'm not therian/otherkin, to be clear, but I feel like the mere fact that you are genuinely asking these questions to yourself is probably an indicator of SOMETHING at least. Maybe you're not otherkin after all -- only you would know! -- but I empathize with the frustration of not having an answer.
I consider myself alterhuman, and I feel somewhat similar. I just don't really vibe with my body too much, I'd prefer to be an anthro, but it's more of an indifference than dysphoria.
Though it does affect my sexuality to some extent too.